1937 The Aeroplane Directory of the Aviation and Allied Industries
From Graces Guide
- “Citex” Fire Extinguisher Co
- “Diamond H” Switches
- “Electrona” Electrical Products
- “Geographia”
- “H. Diamond” Switches
- “M. K.” Electric
- “Monitor” Patent Safety Devices
- “Nesta”
- “Triplex” (Northern)
- “Triplex” Safety Glass Co
- “Weser” Flugzeugbau Gesellschaft
- A C-Sphinx Sparking Plug Co
- A. A. Brazier and Co
- A. A. D. La Touche
- A. A. Godwin and Son
- A. Adkins and Sons
- A. and A. J. Law
- A. and A. J. Main and Co
- A. and J. Main and Co
- A. and T. Main and Co
- A. Arnold and Co
- A. B. C. Motors
- A. B. Gibbons
- A. Batchelor
- A. Burnwell
- A. Burnwell and Co
- A. C. Cossor
- A. C. M. Jackaman
- A. C. Sproston
- A. C. Wells and Co
- A. C. Wickman
- A. Charles Betts and Co
- A. Collinge
- A. D. S. Barr
- A. Dobson
- A. E. Bennett and Co
- A. E. Dobell
- A. E. F. Manufacturing Co
- A. E. H. Campbell
- A. E. H. Coltman
- A. E. Harris and Co
- A. E. Harris and Co (Birmingham)
- A. E. Jolivet
- A. E. Skinner and Co
- A. F. Hill
- A. Finney and Co
- A. G. fur Dornier-Flugzeuge
- A. G. G. Marshall
- A. G. Poole
- A. Green and Sons
- A. H. Wheeler
- A. H. Wilkie and Co
- A. Henshaw
- A. Hopkinson
- A. J. Holladay and Co
- A. J. Linnell
- A. J. Walter
- A. Jackaman and Son
- A. Kay and Sons
- A. M. Richardson
- A. Macnair and Co
- A. N. T. Rankin
- A. O. Roth
- A. P. Lundberg and Sons
- A. P. Newall and Co
- A. P. Thurston and Co
- A. Phillips
- A. Q. Cooper
- A. R. Colman
- A. R. Senior
- A. Reyrolle and Co
- A. S. Bacon and H. S. Butts
- A. S. Bathard and Co
- A. S. Butler
- A. S. Walter, Tovarny Na Automobily a Letecke Motory
- A. S. Zlinska letecka
- A. Sanderson and Co
- A. Southern and Co
- A. V. Roe and Co
- A. V. Tomkins
- A. W. Martin and Co
- A. W. Weyman and Partners
- A.C.-Sphinx Sparking Plug Co
- A-1 Electric Welding Appliances
- Abbey Coachworks
- Abbott, Anderson and Abbott
- Aberdeen Airways
- Abie Batteries Co (1927)
- Abies Battery Co
- Abies Battery Co (1927)
- Abis and Co
- Abis and Co (Birmingham)
- Accles and Pollock
- Accles and Shelvoke
- Accurate Recording Instrument Co
- Acme Electrical Manufacturing Co
- Acme Lock Nut Co
- Acme Lock Nut Co (Shaws Patent)
- Acme Spring Co
- AC-Sphinx Sparking Plug Co
- Acton and Borman
- Acton Manufacturing Co
- Adam and Lane and Neeve
- Adamant Engineering Co
- Adams and Co
- Adams and Co (London)
- Adastra Airways
- Adcock and Shipley
- Adcocks
- Adlerwerkevorm, Heinrich Kleyer A. G.
- Adock and Shipley
- Adolphe Crosbie and Co
- Advance Motor Manufacturing Co
- Aer Lingus Teoranta
- Aeraspray Manufacturing Co
- Aerial Photographic Co
- Aerial Sites
- Aerial Transport Company of Siam
- Aernautical and Panel Plywood Co
- Aero Club Brasileiro
- Aero Club de France
- Aero Club der Schweiz
- Aero Club of India and Burma
- Aero Club of the Polish Republic
- Aero Club Royal d’Egypte
- Aero Engineering Corporation
- Aero Engines
- Aero Lloyd Iguassu, S.A.
- Aero Motor Spirit Co
- Aero O/Y
- Aero Piston Ring Co
- Aero Precision Machinists
- Aero Research
- Aero Services
- Aero Tovarna Letadel Dr. Kabes
- Aero-Club del Peru
- Aero-Club of Greece
- Aero-Club von Deutschland
- Aerofilms
- Aeroflot
- Aerograph Co
- Aeroklub of the Czechoslovak Republic (Aeroklub Ceskoslovenskie)
- Aeromarine
- Aeromaritime (Compagnie des Chargeurs Reunis)
- Aeronautica d’Italia
- Aeronautica Macchi, S. A.
- Aeronautical Chamber of Commerce of America
- Aeronautical Corporation of Great Britain
- Aeronautics
- Aeronaves de Mexico, S. A.
- Aeropilot
- Aeroplane and Motor Aluminium Castings
- Aeroplanes Henry Potez
- Aeroplanes Morane-Saulnier
- Aeroposta Agentina, S.A.
- Aeropostal Venezolana
- Aeroput (Yugoslavia)
- Aeroput (Greece)
- Aerostyle
- Aerovias Nacionales (Sur Malek)
- Aerovias Nacionales Empresa Roman Macaya
- African Air Services
- African Air Transport
- African Explosives and Industries
- African Flying Services
- Agra Engineering Co
- Agra Engineering Co (1934)
- Air Afrique (Commandant d’Agnaux)
- Air Agency
- Air Commerce
- Air Dispatch
- Air Ducts
- Air Estates
- Air France
- Air France (Chile)
- Air France (Czechoslovakia)
- Air France (France)
- Air France (Greece)
- Air France (Hungary)
- Air France (India)
- Air France (Poland)
- Air France (Roumania)
- Air France (Yugoslavia)
- Air France and Deutsche Luft Hansa (Bulgaria)
- Air Greasecup Co
- Air Hire
- Air Industrial Developments
- Air League of the British Empire
- Air Lines (W.A.)
- Air Lines of Australia
- Air Log Co
- Air Publicity
- Air Pumps
- Air Sales and Service
- Air Service
- Air Service Training
- Air Survey Co
- Air Taxi Co
- Air Taxis
- Air Transport and Sales
- Air Transport Manufacturing Co
- Air Travel
- Air Travel, New Zealand
- Air Trips
- Air Vice-Marshal A. E. Borton
- Airco
- Aircraft Association
- Aircraft Components
- Aircraft Distributors
- Aircraft Exchange and Mart
- Aircraft Facilities
- Aircraft General Supplies
- Aircraft Industries Corporation
- Aircraft Materials
- Aircraft Materials Aircraft Patents
- Aircraft Mechanics
- Aircraft Operating Company of Africa
- Aircraft Patents
- Aircraft Propellers
- Aircraft Research and Development Co
- Aircrafts Pty.
- Air-France (Brazil)
- Airports
- Air-Roads and Patents
- Airscrew Co
- Airspares
- Airspeed
- Airspeed (1934)
- Airways Union
- Airwork
- Airworthiness
- Akciova Spolecnost Pro Prumysl Letecky
- Aktiebolaget Aerotransport (Swedish Air Lines)
- Aktiebolaget Svenska Jarnvagsverkstaderna
- Al Electric Welding Appliances Co
- Ala Littoria (Egypt)
- Ala Littoria, S. A. (Greece)
- Ala Littoria, S. A. (Italy)
- Ala Littoria, S.A. (Albania)
- Alabastine Co (British)
- Alan Cobham (Aviation)
- Aland Fan Co
- Aland Fan Co (Aland and Co)
- Albany Engineering Co
- Albastine Co
- Albert Jagger
- Albion Drop Forgings Co
- Albion Forgings Co
- Albion Foundry
- Albion Oils
- Aldis Brothers
- Alec Lindsay M.I.E.E.
- Alex Jacob and Co
- Alex Tough and Son
- Alexander Duckham and Co
- Alexander Shanks and Son
- Alexander Tough and Son
- Alexander Wright and Co
- Alexander, Herbert and Co
- Alfred A. Corre and Co
- Alfred A. Odoni and Co
- Alfred Beebee
- Alfred Come (Schweizerische Flugzeugfabrik)
- Alfred Grindod and Co
- Alfred Herbert
- Alfred Hopps Sons and Co
- Anglo-American Vulcanized Fibre Co
- Alkit
- Alklum Storage Batteries
- Alklum Storage Batteries Co
- Allan, Arthur and Ure
- Allan, Edgar and Co
- Allen Harrison and Co
- Alley and Maclellan
- Alliance Petroleum Marketing Co
- Allot Jones and Co
- Allott, Jones and Co
- Alnwick Construction and Engineering Co
- William Bain and Co
- Alpar, Schweiz Luftverkehrs, A. G.
- Altigraph
- Aluminium Coropration
- Aluminium Equipment Co
- Aluminium Plant and Vessel Co
- Aluminium Union
- Alva
- Alvis
- Alvis Straussler
- Amal
- Amalgams Co
- Amalgams Company
- American Airlines
- Ames Crosta Mills and Co
- Andersons Rubber Co
- Andrew G. Soutter and Co
- Andrew H. Baird
- Andrew Johnson and Son
- Andrew Womersley and Son
- Andrews Toledo
- Anglo Abrasive Works
- Anglo-American Oil Co
- Anglo-American Vulcanized Fibre Co
- Anglo-Bosphorous Oil Co
- Anglo-Iranian Oil Co
- Anglo-Swiss Electrical Co
- Anglo-Swiss Electrical Company
- Anglo-Swiss Screw Co
- Ansett Airways (Pty.)
- Anti-Attrition Metal Co
- Antifyre
- Antwerp Aviation Club
- Appleton and Howard
- Arado Flugzeugwerke, G. m. b. H.
- Archer Works Engineering Co
- Archibald Pearce and Co
- Architectural Services
- William Bain and Co
- Arens Controls
- Argonaut Aircraft Co
- Argus Motoren, G. m. b. H.
- Armstrong and Siddeley Motors
- Armstrong Cork Co
- Armstrong Siddeley Motors
- Army Aircraft Factory (Kjeller Flyfabrikk)
- Arnott and Harrison
- Arnott and Harrison (1928)
- Arora Co
- Arrow Aircraft
- Arrow Aircraft and Motor Corporation
- Arrow Electric Switches
- Arrow Electrical Switches
- Arthur B. Williams
- Arthur Balfour and Co
- Arthur Chester
- Arthur Holden and Sons
- Arthur J. T. Goss and Co
- Arthur L. Gibson and Co
- Arthur Lee and Sons
- Arthur Raybould
- Arthur Smart and Sons
- Aryton and Co
- Asahi Periodical Air Navigation Society
- Asbestos Corporation
- Asbestos Fireproof and General Paint Co
- Asbestos Quarries
- Asiatic Petroleum Co
- Askey and Quine
- Assam Oil Co
- Associated Belting Co
- Associated Belting Companies
- Associated Electric Welders
- Associated Fire Alarms
- Association of British Chemical Manufacturers
- Association of Drop Forgers and Stampers
- Astral Engineering Co
- Astral Oils and Disinfectants
- Atlantic Coast Air Services
- Atlas Air Services
- Atlas Carbon and Battery Co
- Atlas Diesel Co
- Atlas Metal and Alloys Co
- Atlas Preservative Co
- Attwater and Sons
- Aublet Homer and Co
- Auster
- Austin and Hayes
- Austin Motor Co
- Australian National Airways (Pty.)
- Austroflug
- Auto Diesels
- Auto Fire Protection
- Autocar Electrical Co
- Auto-Klean Strainers
- Automobile Association (Aviation Department)
- Automotive Engineering Co
- Automotive Products Co
- Thomas Bolton and Sons
- Automotive Spares
- Autoset Clamp Co
- Auto-Union, A. G.
- Aveling-Barford
- Avery Equipment
- Avery-Hardoll
- Avia Akciova Spolecnost Pro Prumysl Letecky
- Aviatik Beider Basel
- Aviation and General Insurance Co
- Aviation Commerce
- Aviation Council (Japan)
- Aviation Developments
- Aviation Holding Co
- Aviation Manufacturing Corporation
- Aviation Manufacturing Corporation (Lycoming Division)
- Avions Amiot (S.E.C.M.)
- Avions Caudron-Renault
- Avions Henri, Maurice et Dick Farman
- Avions Legers Leopoldoff
- Avions Marcel Bloch
- Avions Mauboussin
- Ayrton and Co
- B. Bunston-Roberts
- B. E. N. Patents
- B. French
- B. H. Pottier and Co
- B. H. Saunders and Co
- B. Haar
- B. J. Hall and Co
- B. J. Piper
- B. L. Pewtress
- B. Selier
- B.M.W.-Flugmotorenbau, G. m. b. H.
- Back and Lindgren
- Baird and Tatlock (London)
- Bakelite
- Baldwin, Son and Co
- Baldwins
- Bamfords
- Bank Bridge Works
- Banks and Sons
- Barimar
- Barkley-Grow Aircraft Corporation
- Barlow and Chidlaw
- Barnett, Tagant and Gotts
- Bartoline (Hull)
- Barton Rivet Co
- Bastian and Allen
- Bates and Nortcliffe
- Batteries
- Baume and Co
- Baxter, Fell and Co
- Baxters (Bolts, Screws and Rivets)
- Bayerische Flugzeugwerke, A. G.
- Beard and Fitch
- Bearings Service Co
- Beckett, Laycock and Watkinson
- Beech Aircraft Co
- Beldam Asbestos Co
- Beldam Packing and Rubber Co
- Belfast Ropework and Co
- Belfast Ropework Co
- Beliss and Morcom
- Bell Aircraft Corporation
- Bell Rock Belting Co
- Bell’s Asbestos and Engineering Supplies
- Bellanca Aircraft of Canada
- Bellis, Morcom
- Belliss and Morcom
- Bells Asbestos and Engineering Supplies
- Beltfasteners
- Belting and Mechanical Leather Co
- Ben O. Howard
- Bendix
- Benjamin Electric
- Benjamin Whittaker
- Benton and Stone
- Berger, Lewis and Sons
- Bergougnan Tyre Co
- Berkefeld Filters and Water Softeners
- Berry Wiggins and Co
- Besler Systems
- Bessbrook Spinning Co
- Bibby Garnock and Co
- Bifurcated and Tubular Rivet Co
- Billington and Newton
- Birimingham Electric Furnaces
- Birkett Air Service
- Birmingham Aluminium Casting Co (1903)
- Birmingham Aluminium Casting Co
- Birmingham Belting Co
- Birmingham Electric Furnaces
- Birmingham Medal Co
- Birmingham Products
- Birmingham Tool and Gauge Co
- Bitulac
- Black and Decker
- Blackburn Aeroplane and Motor Co
- Blackburn Aircraft
- Blackburn and Crawshaw
- Blackpool and West Coast Air Services
- Blackstone and Co
- Blackwells Metallurgical Works
- Blakemore and Co
- Bleriot-Aeronautique
- Bloctube Controls
- Bloctube Controls (R. Tampier)
- Blundell Spence and Co
- Blundell, Spence and Co
- Blundells and Albert T. Crompton and Co
- Blundells and T. Albert Crompton and Co
- Bo’ness Iron Co
- Boeing Aircraft of Canada
- Bolt and Nut Co (Tipton)
- Boneham and Turner
- Boodle and Dunthorne
- Bosch
- Boston Blacking Co
- Boulton and Paul
- Boulton Paul Aircraft
- Bowden (Engineers)
- Bowen and Co
- Bowketts Wire Mills
- Bowleys
- Bowmaker
- Boyriven
- Boyriven (Hardware)
- Bradley and Burch (Ilford)
- Bradley Brothers
- Bradshaws International Air Guide
- Brake Linings
- Brandenburgische Motorenwerke, G. m. b. H.
- Braniff Airways
- Bray Hawkhead and Son
- Bray, Gibb and Co
- Brayshaw Furnaces and Tools
- Bretts Stamping Co
- Brian Allen Aviation
- Brian Lewis and Co
- Bridge Foundry Co
- Brierley, Edmund
- Bristol Aeroplane Co
- Bristol Channel Airways
- Bristol Manufacturers
- Bristol Pneumatic Tools
- Britannia Batteries
- British Acheson Electrodes
- British Aero Components
- British Air Transport
- British Aircraft Manufacturing Co
- British Airways
- British Airways (Sweden)
- British Aluminium Co
- British Anodising
- British Anzani Engineering Co
- British Aviation Insurance Co
- British Belting and Asbestos
- British Celanese
- British Cellulose Lacquers
- British Coal Petrol Mixture
- British Coastal Airways
- British Continental Airways
- British Cystoscope Co
- British Driver Harris and Co
- British Driver Harris Co
- British Ebonite Co
- British Equipment Co
- British Glasruit
- British Glues and Chemicals
- British Hard Rubber Co
- British Hose and Appliances Co
- British Industrial Gases
- British Industrial Plastics
- British Instrument Co
- British Insulated Cables
- British Landing Gears
- British Lock Washers
- British Manzel Oil Co
- British Manzel Oil Pump Co
- British Marine Aircraft
- British Metallic Packings Co
- British Metallic Packings Co (1933)
- British Mica Co
- British Oxygen Co
- British Piston Ring Co
- British Portland Cement Manufacturers
- British Power Boat Co
- British Pressed Panels
- British Rawhide Belting Co
- British Rola Co
- British Rolling Mills
- British Ropes
- British Salmson Aero Engines
- British Scandinavian Airways
- British Scientific Instrument Research Association
- British Screw Co
- British Separators
- British Standard Institutions
- British Steelwork Association
- British Thermit
- British Thomson-Houston Co
- British Timken
- British Trolley Track Co
- British Tyre and Rubber Co
- British Vulcanised Fibre
- British Xylonite Co
- British-American Air Services
- Britoyl Lubricants
- Brittania Batteries
- Bromley-Langton Electric Wire and Insulator
- The Bromley-Langton Electric Wire and Insulator Co
- Brooke Tool Manufacturing Co
- Brookes (Oldbury)
- Brookhirst Apparatus Co
- Brookhirst Switchgear
- Brooklands Aviation
- Broom and Wade
- Broughton-Blayney Aircraft Co
- Brown and Forth
- Brown Bayleys Steel Works
- Brown Brothers (Aircraft)
- Bruce Peebles and Co
- Bruntons (Musselburgh)
- Brush Electrical Engineering Co
- Bucker Flugzeubau, G. m. b. H.
- Buckley, Saunders and Co (Pontelec)
- Builders Copper Tube Supply Co
- Bull Motors
- Bullers
- Bulls Metal and Melloid Co
- Bulpitt and Sons
- Bunhill Publications
- Burberrys
- Burchs
- Burgess Products Co
- Burley
- Burmah Oil Co
- Burnelli Aircraft
- Burnelli Aircraft (Motor Division)
- Burt Brothers
- Burtonwood Motor and Aircraft Engineering Co
- Butler Air Transport Co
- Butlers Aero Works
- C. A. Baldwin and Co
- C. A. Nepean Bishop
- C. A. V. Bosch
- C. and B. Smith
- C. and J. Hampton
- C. and W. Walker
- C. B. Field
- C. B. Mills
- C. C. Wakefield and Co
- C. Churchill and Co
- C. D. Monniger
- C. E. Baker and Partner
- C. E. Berens
- C. E. Gardner
- C. E. Heinke and Co
- C. E. Horne
- C. E. Lambe
- C. E. Mercer
- C. F. Brooke
- C. F. R. Giesel
- C. F. R. Griffin
- C. Frost
- C. G. M. Alington
- C. G. Taylor
- C. G. Templer and Co
- C. G. Vokes
- C. Groom
- C. H. Cooper
- C. H. Johnson and Sons
- C. H. Leng and Sons
- C. H. Robinson and Co
- C. H. Tutt
- C. Howitt
- C. J. Donada
- C. J. Edwards and Son
- C. L. Berrington
- C. L. W. Aviation Co
- C. L. W. Aviation Co (1936)
- C. Lindley and Co
- C. M. D. Engineering Co
- C. Ogle
- C. R. Averill
- C. R. Shoults
- C. S. Burney
- C. S. Napier
- C. V. Bolton, F. S. M. C.
- C. W. Callery and Co
- C. W. Walker
- C. Watson
- A. C. Wickman
- Callenders Cable and Construction Co
- Calorizing Corporation of Great Britain
- Cambridge Instrument Co
- Campbell Aircraft Co
- Canadian Airways
- Canadian Colonial Airways
- Canadian Flying Clubs Association
- Canadian Vickers
- Cantieri Aeronautici Bergamaschi (Caproni)
- Cantieri Riuniti Dell’Adriatico Monfalcone
- Capt. R. W. A. Brewer
- Captain G. De Havilland
- Captain I. C. Maxwell
- Captain I. O’B. MacGregor
- Captain J. K. Mathew
- Captain Merriam, A.F.C., A.F.R.Ae.S.
- Captain R. G. Cazalet
- Captain S. Burt
- The Honourable Captain Lionel Lambart
- Captain W. R. Bailey
- Carbic
- Carborundum
- Carborundum Co
- Carden Aero Engines
- Carden-Baynes Aircraft
- Cardiff Foundry and Engineering Co
- Cargo Fleet Iron Co
- Carkeek and Sons
- Carl Zeiss (London)
- Carless, Capel and Leonard
- Carlos Mayse
- Carlos Panini
- Carobronze
- Carpenter and Tildesley
- Carron Co
- Carron Company
- Cartright
- Cassel Cyanide Co
- Castle Leather Co
- Castleton Steam Packing Co
- Cattley, Ernest and Co
- Caxton Name Plate Manufacturers Co
- Caxton Steel Co
- Cedos Engineering Co
- Celestor Manufacturing Co
- Cellactite and British Uralite
- Cellon
- Celtic Stamping Co
- Cement Marketing Co
- Central Aerophoto Co
- Central Airlines
- Central American Air Transport Co (T. A. C. A.)
- Cercke Liegois d’Aviation de Tourisme
- Ceskomoravska-Kolben-Danek Co
- Chamier Gilbert-Lodge and Co
- Chamier Gilbert-Lodge Co
- Champion Sparking Plug Co
- Chance Brothers and Co
- Chance Vought Aircraft
- Chantiers Aero-Maritimes de la Seine
- Chantiers Aeronavals E. Romano
- Chapman Engineering Co
- Charles A. Betts and Co
- Charles Baker
- Charles Baughan
- Charles Benn and Sons
- Charles Churchill and Co
- Charles Clifford and Son
- Charles H. Pugh
- Charles Harrison and Co
- Charles Harrold and Co
- Charles Richards and Sons
- Charles Richardsons and Sons
- Charles S. Madan and Co
- Charles Taylor (Birmingham)
- Charles Tennant and Co
- Charles Weston and Co
- Charrier Mouldings
- Chatwin, Thomas and Co
- Chemical and Insulating Co
- Chesterfield Tube Co
- Chicago and Southern Airlines
- Child and Hewitt
- China National Aviation Corporation
- Chloride Electric Storage Co
- Chloride Electrical Storage Co
- Chrislea Aircraft Co
- Christiani and Nielson
- Christopher J. and Sons
- Chromates
- Churchill Machine Tool Co
- Cia Aeronautica de la Sierra, S. A.
- Cia Aeronautica del Sur, S. A.
- Cia de Aviacion Faucett, S. A.
- Cia de Transportes Aeros (Senor Gelabert)
- Cia Nacional Cubana
- Cia Transporte Aereos de Chipas, S. A.
- Cia Transportes Aereos de Veracruz, S. A.
- Cierva Autogiro Co
- Cinque Ports Aviation
- Cirrus Hermes Engineering Co
- Citex Fire Extinguisher Co
- City Sheet Metal Works
- Civil Aviation
- Civil Aviation (Tanganyika)
- Civil Aviation (Argentina)
- Civil Aviation (Australia)
- Civil Aviation (Austria)
- Civil Aviation (Belgium)
- Civil Aviation (Bolivia)
- Civil Aviation (Brazil)
- Civil Aviation (Bulgaria)
- Civil Aviation (China)
- Civil Aviation (Colombia)
- Civil Aviation (Costa Rica)
- Civil Aviation (Cuba)
- Civil Aviation (Czechoslovakia)
- Civil Aviation (Denmark)
- Civil Aviation (Egypt)
- Civil Aviation (Estonia)
- Civil Aviation (Finland)
- Civil Aviation (France)
- Civil Aviation (Greece)
- Civil Aviation (Holland)
- Civil Aviation (Hungary)
- Civil Aviation (India)
- Civil Aviation (Irish Free State)
- Civil Aviation (Latvia)
- Civil Aviation (Malaya)
- Civil Aviation (Mexico)
- Civil Aviation (New Zealand)
- Civil Aviation (Norway)
- Civil Aviation (Peru)
- Civil Aviation (Poland)
- Civil Aviation (Portugal)
- Civil Aviation (Roumania)
- Civil Aviation (Russia)
- Civil Aviation (Salvador)
- Civil Aviation (Siam)
- Civil Aviation (South Africa)
- Civil Aviation (Southern Rhodesia)
- Civil Aviation (Sweden)
- Civil Aviation (Switzerland)
- Civil Aviation (Turkey)
- Civil Aviation (U.S.A.)
- Civil Aviation (Uruguay)
- Civil Aviation (Venezuela)
- Civil Aviation (Yugoslavia)
- Civil Aviation Office (Netherlands East Indies)
- Clare-Collets
- Clarke and Vigilant Sprinklers
- Clarke, Chapman and Co
- Clarkes (Redditch)
- Claude-General Neon Lights
- Clay and Atkinson
- Clayton Dewandre Co
- Clayton Folkerts
- Cleveland Oil Co
- Cleveland Petroleum Products Co
- Cleveland Product Co
- Clews Petersen Piston Ring and Engineering Co
- Clive Greenway, Vale and Co
- Club Aeronautique Caroloregien
- Clyde Aero Engine Co
- Clyde Allow Steel Co
- Clyde Crane and Engineering Co
- Colas Products
- Colbit
- Colledge and Bridgen
- Collins and Son
- Colombo
- Colonel J. F. Turner
- Colvilles
- Comdr. C. Croxford
- Commercial Air Hire
- Commercial Aviation (Chile)
- Commercial Aviation Co Pty.
- Compagnia Nazionale Aeronautica
- Compagnie Air-France
- Compagnie des Avion Hanriot
- Compagnie Lilloise de Moteurs
- Compania de Aviacion Condor
- Compania de Aviacion Pan-Americana Argentina, S.A.
- Compania Mexicana de Aviacion, S. A.
- Compania Nacional de Aviacion (T. A. C. A.)
- Companias Aerovias Centrales, S. A.
- Comper Aeroplanes
- Connolly Brothers (Curriers)
- Consolidated Aircraft Corporation
- Consolidated Pneumatic Tool Co
- Constructions de Planeurs a Moteur Auxiliare
- Continental Motors Corporation (Aircraft Engine Division)
- Cook Strait Airways
- Cooke, Troughton and Simms
- Cookson Lead and Antimony Co
- Cooper and Sons (Sheffield)
- Cooper, Webb-Jones and Co
- Coopers Garage (Surbiton)
- Cooper-Stewart Engineering Co
- Corfield and Buckle
- Cork Insulation Co
- Cork Manufacturing Co
- Corona Engineering Co
- Costruzioni Meccaniche Aeronautiche, S. A.
- County Chemical Co
- Coventry Gauge and Tool Co
- Coventry Magneto Co
- Coventry Victor Motor Co
- Cramlington Aircraft
- Cranford Manufacturing Co
- Craven and Speeding Brothers
- Craven Brothers (Manchester)
- Crawford, Hughes and Co
- Crawley, Parsons and Co
- Cressall Manufacturing Co
- Croager Brothers
- Crofts (Engineers)
- Cromil and Piercy
- Crompton Parkinson
- Crosbie, Adolphe and Co
- Crosby Engineering Co
- Cross Alloy Cylinders
- Crossley Brothers
- Crouch-Bolas Aircraft Corporation
- Croydon Airways
- Croydon Cable Works
- Crypto Electric Co
- Crystalate Gramophone Record Manufacturing Co
- Cub Aircraft
- Curtis Manufacturing Co
- Czechoslovak Aviation Co
- Czechoslovak State Air Lines
- D. Anderson and Son
- D. Brown and Sons
- D. C. Durgoyne
- D. F. W. Atcherley
- D. H. Bonnella and Son
- D. K. Fairweather
- D. Lewis
- D. M. Henderson and Co
- D. Mitchell and Co
- D. Morgan Rees and Sons
- D. Napier and Son
- D. P. Battery Co
- D. Powis and Sons
- D. R. Pobjoy
- D. Schreiber, M.V.O.
- Dacier
- Daimler-Benz, A. G.
- Danks, Edwin and Co (Oldbury)
- Dargue Acetylene Gas Co
- Darjavna Aeroplanna Robotilnitza
- Darlington Rolling Mills Co
- Darlington Wire Mills
- Darmstadt University Aviation Society
- Dart Aircraft
- Dart Spring Co
- Darwins
- Dashwood and Partners
- Davey and Co
- Davey and Co London
- David and Leslie Keay
- David Baxter and Sons
- David Bentley (Leicester)
- David Harcourt
- David J. Patton (1934)
- David Keay and Leslie
- David Moseley and Sons
- David Powis and Sons
- David Rowell and Co
- David Waddell and Sons
- Davidson and Co
- Davies Brothers (Asphalters)
- Davies Coleman and Co
- Davies, Richard and Leather Co
- Davis and Timmins
- Davis Gas Stove Co
- De Bergues Patents
- De Havilland Aircraft Co
- De Havilland Aircraft of Canada
- Dee Oil Co
- Del Guerra Oilskin Manufacturing Co
- Delco Remy and Hyatt
- Deloro Smelting and Refining Co
- Delta Airlines
- Delta Metal Co
- Demolition and Construction Co
- Denbighs Engineering Co
- Denhams Engineering Co
- Dening and Co
- Dennis Brothers
- Dennis Millar and Co
- Dennis, Adams and Co
- Dent and Co and Johnson
- Derby Cables
- Deritend Stamping Co
- Deruluft (Latvia)
- Deruluft (Lithuania)
- Deruluft (Russia)
- Desmo
- Desoutter Brothers
- Det Dankse Luftfartselskab, A. S. (D.D.L.)
- Det Kongelige Danske Aeronautiske Selskab (The Royal Danish Aeronautical Society)
- Det Norske Luftfartselskap Fred. Olsen and Bergenske, A/S
- Deutsche Luft Hansa (Yugoslavia)
- Deutsche Luft Hansa, A. G. (Czechoslovakia)
- Deutsche Lufthansa, A. G. (Germany)
- Deutsche Lufthansa, A. G. (Greece)
- Deutsche Zeppelin Redderei
- Deutscher Luftsport-Verband, E. V.
- Deutsche-Russiche Luftverkehrs-Gesellschaft
- Diagrid Structure
- Dicks Asbestos Co
- Dixon Corbitt
- Dixon, Powner and Sons
- Dixonia
- Dixons, Cardiff and South Wales Ropeworks
- Dobbie, McInnes and Clyde
- Dobbs Brothers and Hitchman
- Docker Brothers
- Dod Brothers
- Dominion Motor Spirit Co
- Dominion Skyways
- Donald Brown (Brownall)
- Donovan Electrical Co
- Dorman and Smith
- Dornier Metallbauten, G. m. b. H.
- Doswiadczalne Warsztaty Lotnicze
- Douglas, Lawson and Co
- Dover
- Dowsing Co (Electrical Manufacturers)
- Dowsing Company (Electrical Manufacturers)
- Dowson and Mason Gas Plant Co
- Drake and Dahm (Translators)
- Drayton Regulator and Instrument Co
- Drysdale and Co
- Du Bois Co
- Duchess of Bedford
- Duke, Waring, Crisp and Co
- Duncan Watson Electrical Engineers
- Dunford and Elliott (Sheffield)
- Dunlop and Ranken
- Dunlop Rubber Co
- Durastic Bituminous Products
- Durex Abrasives
- Dussek Bitumen and Taroleum
- Duston and Co (Inc. G. and P. Hookham)
- Dutson and Co
- E. A. Allam and Co
- E. A. and H. Sandford
- E. A. Mason
- E. A. Morgan
- E. A. Powrie
- E. A. Roper and Co
- E. A. Warth
- E. and A. Mason
- E. and F. Richardson
- E. Austin and Sons (London)
- E. B. Meyrowitz
- E. B. Sloan
- E. Baker
- A. E. Bennett and Co
- E. C. Paget
- E. Cecil Kny
- E. Ch. de Law
- E. Claybourne and Co
- E. D. Abbott
- E. D. Spratt
- E. D. Ward
- E. Dent and Co
- E. E. Marsh
- E. F. Richardson
- E. F. Walter
- E. G. Acheson
- E. G. Brown and Co
- E. G. Croskin
- E. G. Davis
- E. G. H. Forsyth
- E. Goddard
- E. H. Chambers
- E. H. F. Fuller
- E. H. Gray
- E. H. Wheelwright
- E. H. Whitehouse and Co
- E. Hawkesworth and Co
- E. Hill Aldam and Co
- E. Hill, Adlam and Co
- E. J. D. Guild
- E. J. Jobling-Purser
- E. J. Rawlins and Co
- E. James and Co
- E. Kalker and Co
- E. L. Donner
- E. M. Evans and Son
- E. M. Lamb
- E. N. Bray
- E. P. Allam and Co
- E. P. Barrus
- E. P. Fairburn
- E. R. Plugs
- E. Small and A. D. Hardie
- E. Thomas
- E. V. Beaumont
- E. W. Hart
- E. W. Kendrew
- E. W. Puckert
- E. W. Walford
- E. W. Wollaston
- Eagle Engineering Co
- Eagle Oil and Shipping Co
- Ealing Park Foundry
- Earl of Cardigan
- Earl of Dudleys Round Oak Works
- Earl of Essex
- Earle, Bourne and Co
- Earle, Stanley and Co
- Easilit Blow Lamp Co
- East Coast Airways
- East London Paint and Varnish Co
- East Midland Aviation Co
- Eastern Airlines
- Ebonestes Industries
- Ebonite Container Co
- Edgar Allen and Co
- Edison Swan Electric Co
- Edmiston Brown and Co
- Edmiston, Brown and Co
- Edmund Brierley
- Educational Supply Association
- Edward G. Herbert
- Edward Joy and Sons
- Edward Pryor and Son
- Edward Stanford
- Edward Webb and Sons (Stourbridge)
- Edward Wilcox and Co
- Edwin Danks and Co (Oldbury)
- Effingham Steel Works
- Elders Colonial Airways
- Electric Construction Co
- Electric Resistance Furnace Co
- Electric Welders (Slough)
- Electrical Apparatus Co
- Electrical Auto Services
- Electrical Auto Services Co
- Electrical Illuminating Co
- Electrical Power Engineering Co (Birmingham)
- Electrical Screw
- Electro Dynamic Construction Co
- Electrona Electrical Products
- Elliott Brothers (London)
- Elliotts Metal Co
- Ellis and Coe
- Ellison Insulations
- Ellison Kayser and Co
- Empire Rubber Co
- Empire Rubber Company
- Empire Spring Co
- Empresa Nacional de Transportes Aereos (E.N.T.A.)
- Empreze de Viacao Aerea Rio Grandense
- English Steel Corporation
- En-Tout-Cas Co
- Epidaurus Trust
- Equipment and Engineering Co
- Erla-Machinenwerk, G. m. b. H.
- Ernest Cattley and Co
- Ernest Lake
- Ernest Turner
- Ernst Heinkel Flugzeugwerke, G. m. b. H.
- Erskine, Heap and Co
- Espenlaub-Flugzeugbau
- Essex Aero
- Essor Manufacturing Co
- Etablissements E. Train
- Etablissements Liore-et-Olivier
- Etablissements Pierre Mengin
- Eurasia Aviation Corporation
- Euston Ignition Co
- Eve
- Everclean Antifoulings
- Everett, Edgcumbe and Co
- Everitt and Co
- Evershed and Vignoles
- Ewarts
- Exactor Control Co
- Excelsior Motor Radiator Co
- Exe Engineering Co
- Exors. of James Mills
- Eyre Smelting Co
- F. A. Hughes and Co
- F. A. I. Munz
- F. A. Pullen and Co
- F. A. Pullin and Co
- F. B. Chapman
- F. C. Fisher
- F. C. J. Butler
- F. Davis
- F. Dowler and Sons
- F. Drake and Co
- F. E. Buckland
- F. E. Rowland and Co
- F. E. Tasker
- F. E. Tranter and Co
- F. G. Ketelbey (A.M.I.E.E.)
- F. G. Miles
- F. G. Tennant
- F. Giles and Son
- [[* F. Gough
- F. H. Matsuch
- F. Hattersley Pickard and Co
- F. Hills and Sons
- F. Hulme and Co
- F. J. A. Cameron
- F. J. Ballard and Co
- F. J. Cleare
- F. J. Cleveland and Co
- F. J. Edwards
- F. L. Ingall
- F. Lefevre
- F. Lipscombe and Co
- F. McNeil and Co
- F. O. Soden
- F. Price and Son (Stampers)
- C. F. R. Giesler
- F. Reddaway and Co
- F. S. Dudgeon and Havart
- F. Turner (Art Metal)
- F. W. Green
- F. W. Potter and Soar
- Fabram
- Fabrica Automobili Isotta-Fraschini
- Fabrika Aeroplana 1 Hidroplana Zmaj
- Fahlin Aircraft Co
- Fairby Construction Co
- Fairchild Aircraft
- Fairey Aviation Co
- Fairey. Societe Anonyme Belge “Avions Fairey” S.G.B.A.
- Falcon Oil Co
- Falkirk, Carron Co
- Feeny and Johnson
- Felco Hoists
- Ferguson and Timpson
- Ferodo
- Ferranti
- Ferro-Arc Welding Co
- Ferrox Co
- Fescol
- Fibrax
- Fielder Glazing Co
- Fieseler-Flugzeugbau, G. m. b. H.
- Filma Burners
- Findlay and Co
- Firestone Tyre and Rubber Co
- Firth Co
- Firth-Derihon Stampings
- Firth-Vickers Stainless Steel
- Flather
- Flather and Co
- Fleet Aircraft of Canada
- Fleet and Roberts
- Fleet, Roberts
- Fleetwing Oil Co
- Fleetwings
- Fletcher Brothers
- Fletcher Miller
- Flexible Shaft Manufacturing Co
- Flexo Plywood Industries
- Flextol Engineering Co
- Flight Publishing Co
- Flugzenban Grenchen
- Flugzeugbau Bernhard Scheller
- Flyer Training
- Flying Training
- Foamite Firefoam
- Focke-Wulf Flugzegbau, A. G.
- Fordath Engineering Co
- Forward Oil Co
- Forward Radiator Co
- Forward Sparking Plug Co
- Foster Engineering Co
- Foster Instrument Co
- Foster Wikner Aircraft Co
- Fox and Offord
- Francis J. Field
- Francis Morton and Co
- Francis Paisley
- Francis Wood and Son
- Franco Signs
- Frank How and Co
- Frank L. Anderson
- Frank Wigglesworth and Co
- Franki Compressed Pile Co
- Fraser and Fraser
- Fraser Brothers and Grant
- Frederick Braby and Co
- Frederick Crane Chemical Co
- Frederick Lipscombe and Co
- Frederick Mountford (Birmingham)
- Frederick Wright and Co
- Freeman Heating Co
- Frys (London)
- Frys Metal Foundries
- Fulcher and Co
- Fulham Pottery and Cheavin Filter Co
- Fuller Accumulator Co
- Fuller Accumulator Co (1926)
- Fuller Electrical and Manufacturing Co
- Fyfe, Wilson and Co
- G. A. Essex
- G. and J. Paton
- G. and J. Weir
- G. and M. Lane and Co
- G. Bemridge
- G. Brady and Co
- G. C. Maxwell, M.C., D.F.C., A.F.C.
- G. D. Peters and Co
- G. E. Mortley-Sprague and Co
- G. E. N. Everett
- G. E. Prior-Palmer
- G. E. T. Eyston
- G. E. Wallis and Sons
- G. Ellis and Co
- G. F. Briggs
- G. H. Robinson and Son
- G. H. Smith and Co
- G. H. Wilson-Fox
- G. L. A. France
- G. L. Prendergast
- G. Linnell
- G. N. Haden and Sons
- G. P. Dennis
- G. P. E. and E. F. E. Howard
- G. Q. Parachute Co
- G. R. Armstrong and J. Shand
- G. R. Jones and Co
- G. R. Speaker and Co
- G. S. Davison
- G. S. Ogilvie
- G. S. Peckham and Co
- G. Scott-Pearse
- G. Sonneborn and Co
- G. T. Hawkins
- G. W. Garnett
- G. W. Hall
- G. W. Harben
- G. W. Higgs
- G. Wadsworth and Sons
- Gabriel and Co
- Gale and Polden
- Gallay
- Gambrells, Rowse and Snoaden
- Garden-Baynes Aircraft
- Garnock Bibby and Co
- Garnock, Bibby and Co
- Gas Brothers
- Gataverken
- Gaunt and Hickman
- Gay Brothers
- Gear Grinding Co
- General Aircraft
- General Airways
- General Celluloid Co
- General Electric and Co
- General Electric Co
- General Fire Appliance Co
- Gent and Co
- Geoge Purdom and Co
- Geographia
- George Angus and Co
- George Baker
- George Banham and Co
- George Bennett and Sons
- George Brown and Brothers
- George Burn
- George Cohen, Sons and Co
- George Emmott (Pawsons)
- George Emmott (Rawsons)
- George Green and Co
- George H. Elt
- George H. Rome
- George Hatch
- George Hill and Co
- George Jowitt and Sons
- George Painter and Co
- George Purdom and Co
- George Russell and Co
- George Salter and Co
- George Spencer Moulton and Co
- George Sumner
- George Swift and Sons
- George Taylor (Brass Founders)
- George Taylor (Brass Sprayers)
- George Tucker Eyelet Co
- George Turton, Platt and Co
- George Whalley and Co
- Germ Lubricants
- Gibson (West Bromwich)
- Gieves
- Gill Rhodes Co
- Gillett, Stephen and Co
- Gilt Edge Safety Glass
- Gimson and Co (Leicester)
- Giro Aviation Co
- Gittings and Hills
- Glacier Metal Co
- Glasgow Electrical Engineering Co
- Glass Sealer Co
- Glasso Paint Products
- Gledhill-Brook Time Recorders
- Glenfield and Kennedy
- Gloster Aircraft
- Gloster Aircraft Co
- Gloucester Foundry
- Glover Brothers (Mossley)
- Glyco Metal Co
- Godins
- Goodyear Tyre and Rubber Co (Great Britain)
- Gothaer Waggonfabrik, A. G.
- Gothic Electrical Supplies
- Gourdov-Lesseurre
- Govan Shafting and Engineering Co
- Government Workshops (Portugal)
- Gramophone Co
- Grant and West
- Granville, Miller and de Lackner
- Graphite Oils Co
- Greases
- Great British Rubber Co
- Great Lakes Aircraft Corporation
- Greek National Aircraft Factory
- Greenway, Clive, Vale and Co
- Gresham and Craven
- Gresham and Craven David Harcout
- Grierson
- Griffin and Tatlock
- Griffith Brewer
- Gross Sherwood and Heald
- Grosvenor and Co (London)
- Grosvenor Electric Batteries
- Group Captain W. H. Primrose, A.F.C., R.A.F.
- Grover Loening Aircraft Co
- Guernsey Airways
- Guest, Keen and Nettlefolds
- Guild of Air Pilots and Navigators of the British Empire
- Guinea Airways
- Gwinn Aircar Co
- Gwynnes Pumps
- H. A. Johannesen
- H. A. Johannsen (Grimsby)
- H. A. Neale and Co
- H. A. Smith
- H. and E. Lintott
- H. B. G. Michelmore
- H. B. Legge and Sons
- H. Barnett and Co (London)
- H. Bednall
- H. Brammer and Co
- H. Case and Son
- H. Deterding
- H. Dodson and R. C. Caunce
- H. E. Ashdown (Birmingham)
- H. E. Evans
- H. E. Oils
- H. F. Bouskill
- H. G. Everitt
- H. G. Ross and Sons
- H. H. Cooke and Sons (Nottingham)
- H. H. Sykes
- H. Hemming and Partners
- H. Holliday
- H. J. Dolman
- H. J. Dunning and G. E. Ferguson
- H. J. Evans and Co
- H. J. Hardy
- H. J. Pratt and Co
- H. J. Stevens and Sons
- H. J. Tuckett
- H. J. Willis
- H. L. Johnson
- H. M. Hobson Components (Aircraft and Motor)
- H. M. Schofield
- H. N. St. V. Norman
- H. Petre
- H. Pritchett
- H. R. A. Edwards
- H. R. A. Kidston
- H. R. Fields
- H. R. Presland
- H. R. Vaughan and Co
- H. S. Moss and Co
- H. Tinsley and Co
- H. W. Kearns and Co
- H. W. Ward and Co
- H. E. Oils
- Hadfields
- Haggerty, Lawrance and Co
- Hailwood and Ackroyd
- Halford Radio
- Hall and Hall
- Hall and Kay
- Hall and Pickles
- Hall-Aluminium Aircraft Corporation
- Hamburg Flugzegbau, G. m. b. H.
- Hammond Engineering Co
- Hampshire Ignition
- Handley Page
- Hanford Tri-State Airlines
- Harborough Aircraft Construction Co
- Hardman, Ingham and Dawson
- Hardy Spicer and Co
- Harland Engineering Co
- Harold Jackson
- Harper and Tunstall
- Harrison and Cook
- Harrison Brothers
- Harrison, Clark
- Harry J. Pratt and Co
- Hart Accumulator Co
- Harvey Frost and Co
- Haslams (Sheet Metal Workers)
- Hattersley and Davidson
- Hawker Aircraft
- Hawker Siddeley Aircraft Co
- Hawkes and Snow
- Hawkhead, Bray and Son
- Hawkins and Tipson
- Hayes and Marvin
- Haywards
- Heath and Co
- Heath Aviation Co
- Heaton and Dugard
- Hebblethwaite Brothers
- Heenan and Froude
- Held Glue and Compounds Co
- Helvetia Leather Co
- Henri Mignet
- Henry Righton and Co
- Henry Bannister and Co
- Henry Bell and Co
- Henry Blacklock and Co
- Henry Browne and Son
- Henry Caton and Co
- Henry Caton and Co (1936)
- Henry Crossley (Packings)
- Henry F. Cockhill and Sons
- Henry Hewetson and Co (P. P. Shapland)
- Henry Hughes and Son
- Henry Milward and Son
- Henry Pels and Co
- Henry Righton and Co
- Henry Wiggin and Co
- Henschel Flugzeugwerke, A. G.
- Hepworth and Grandage
- Herbert Alexander and Co
- Herbert Morris
- Herbert Terry and Sons
- Herbert W. Bluck
- Heston Aircraft Co
- Hewitt, Wyndham
- Hewittic Electric Co
- Higgins and Cattle
- High Duty Alloys
- Highland Airways
- Hill Top Foundry
- Hill Top Foundry and Co
- Hirtenberger Patronen Zundhutchen-und Metallwarenfabrik
- Hirth-Motoren, G. m. b. H.
- His Majestys Stationery Office
- Hobbies
- Hobson and Sons (London)
- Hodgson and Hodgson
- Hoffman Manufacturing Co
- Hoklykem
- Hoklyken
- Holbrook Machine Tool Co
- Holdens Air Transport Services
- Holman Brothers
- Holt and Willetts
- Holt, Siron and Co
- Homan and Rodgers
- Horace Green and Co
- Horman and Rogers
- Horseley Bridge and Thomas Piggott
- Houseman and Thompson
- Howard Butler
- Howard Hughes
- Howells (Electric Motors)
- Hoyt Metal Co of Great Britain
- Hoyt Metal Company of Great Britain
- Hubert H. P. Trist and Co
- Hudson and Wright
- Hugh J. Scott and Co (Belfast)
- Hughes and Lancaster
- Hughes Johnson Stampings
- Hunt and Co
- Huntley and Sparks
- Hunton
- Hydran Products
- I. C. I. Metals
- I. Calvete
- I. H. List and B. W. Orton
- I. P. Tidman and Partner
- I. Scott
- Igna
- Igna Sparking Plugs
- Igranic Electric Co
- Ikarus, A. D.
- Ilford
- Illston and Robson
- Iloilo-Negros Air Express Co
- Imeson and Finch
- Imperial Airways
- Imperial Airways (Tanganyika)
- Imperial Airways (Malaya)
- Imperial Airways (Bermuda)
- Imperial Airways (Continental)
- Imperial Airways (Czechoslovakia)
- Imperial Airways (Egypt)
- Imperial Airways (Far East)
- Imperial Airways (Greece)
- Imperial Airways (Nigeria and Gold Coast)
- Imperial Aluminium Co
- Imperial Chemical Industries
- Imperial School of Air Navigation
- Imperial Smelting Corporation
- Improved Liquid Glues Co
- Incandescent Heat Co
- Indestructible Paint Co
- India Tyre and Rubber Co
- India Tyre and Rubber Company
- Indian National Airways
- Indian Trans-Continental Airways
- Industrial Steels
- Ing. E. Sparmanns Flygplanverkstad
- Ing. P. Benes and Ing. J. Mraz Tovarna Na Letadla
- Ingersoll
- Ingersoll-Rand Co
- Inniss and Riddle
- Insulators
- Integral Auxiliary Equipment
- Internation Aviation Authority
- Internation Cotton Waste Co
- International Aviation Agency
- International Correspondence Schools
- International Cotton Waste Co
- International Model Aircraft
- Ioco Rubber and Waterproofing Co
- Ipswich Airport
- Irganic Electric Co
- Irish Aero Club
- Irish Arc Welding Co
- Irrawaddy Flotilla and Airways
- Irving Air Chute of Great Britain
- Irwin and Jones
- Isaiah Platt
- Isenthal and Co
- Isola Manufacturing Co
- J. A. H. Parker
- J. A. Harrison and Co
- J. A. Harrison and Co (Manchester)
- J. A. M. Henderson
- J. A. McMullen and J. C. Campion
- J. A. Reynolds
- J. A. Reynolds and Co
- J. and A. Binns
- J. and A. Entwistle
- J. and A. Hillman
- J. and D. Hamilton
- J. and F. May
- J. and R. Oldfield
- J. B. and S. Lees
- J. B. Hall and L. W. Hamp
- J. B. Treasure and Co
- J. Baker and Son
- J. Barden and Co
- J. Bayley
- J. Beardshaw and Son
- J. Belmont Taylor
- J. Bennett Hyde and Co
- J. Bowett-Lindley (1931)
- J. Browett-Lindley
- J. C. C. Green
- J. C. Ley and Sons
- J. C. Savage
- J. Cherry and Sons
- J. Christopher and Sons
- J. Clayton and Co
- J. Corston Sinclair and Co
- J. D. Churm
- J. D. Churn
- J. D. Jones and Co (London)
- J. E. A. Foster
- J. E. Baty and Co
- J. E. D. Holder
- J. E. Hartley and Son
- J. G. Beddoes
- J. G. Ingram and Son
- J. G. Plumb and Son
- J. G. Statter and Co
- J. G. Weir
- J. Garrington and Sons
- J. Gliksten and Son
- J. Granville Grenfell
- J. H. Dallmeyer
- J. H. Fenner and Co
- J. H. Hancock
- J. H. Holmes and Co
- J. H. L. Musker
- J. H. Lavender and Co
- J. H. Ratcliffe
- J. H. Richards and Co
- J. H. Steward
- J. H. Thompson
- J. H. Tucker and Co
- J. H. Yeomans and Sons
- J. Halden and Co
- J. Holdsworth and Co
- J. Holroyd and Co
- J. Hopcraft
- J. J. Habershon and Sons
- J. J. Lister
- J. J. Saville and Co
- J. K. Lawrence
- J. Kendal, Lomax and Co
- J. Knight and Hale
- J. L. Bebb
- J. L. Kier and Co
- J. Lomax Kendal and Co
- J. M. Bickerton
- J. M. Smith and Sons (Leicester)
- J. Macdonald and Co
- J. Mandleberg and Co
- J. Meek and Co
- J. Moores and Co
- J. P. Wakefield
- J. Preston
- J. Procter
- J. R Bramah and Co
- J. R. Bryans
- J. R. Grice
- J. R. Micklethwait
- J. R. Oldfield
- J. Richards and Sons
- J. S. Smith
- J. S. Squires
- J. Stone and Co
- J. Stubbs
- J. Thompson MacLeod
- J. Turner and Sons
- J. V. C. Pearson
- J. W. A. Hunter
- J. W. Adamson
- J. W. and R. Healey Co
- J. W. and T. Connolly
- J. W. Gates and Co
- J. W. Jackman and Co
- J. W. Ray and Co
- J. W. Ray and Co (London)
- J. Walmsley and Sons
- J. Wood and Sons (Wisewood)
- Jack Olding and Co
- Jackson and Brother
- Jacobs Aircraft Engine Co
- Jacuqes Gerin
- James Arnott and Sons
- James Bennie and Sons
- James Beresford and Son
- James Booth and Co
- James Booth and Co (1915)
- James Brown and Sons
- James C. Nicklin
- James Caldwell
- James Chapman and Sons
- James H. Vickery
- James H. Vickery and Co
- James Hunter
- James Keith and Blackman Co
- James Light and Son
- James McCrossan
- James Melling
- James Mills
- James N. Durie and Co
- James North and Sons
- James P. Maginnis
- James R. Crompton and Brothers
- James Rivett
- James Rowbottom
- James Tate and Co
- James Tennant and Co
- James Walker and Co
- James Webster and Brother
- James Webster and Co
- James West
- Japan Aeroplane Works
- Japan Air Transport Co
- Japan Air Transport Institute
- Japan Sea Air Transport Co
- Japanol Enamel Co
- Jasper Bennie and Sons
- Jasper Brown and Sons
- Jenks Brothers
- Jersey Airways
- Jewson and Sons
- John A. Bremner and Co
- John and James White
- John B. Pillin
- John Baird
- John Barbour
- John Bartholomew and Son
- John Bellamy
- John Bullough
- John Cherry and Sons
- John Cluley and Son
- John Collier and Co (Electrical Engineers)
- John Cox and Son
- John Dade
- John E. Mapplebeck
- John Edgington and Co
- John Elsworth and Sons
- John Gibbs and Son
- John Hall and Sons (Bristol and London)
- John Hamilton
- John Hind and Sons
- John Holroyd and Co
- John J. Bowater
- John James and Sons
- John Kerr and Co (Manchester)
- John Laing and Son
- John Lilley and Son
- John Livingston and Sons
- John Lloyd and Sons
- John Macdonald and Co (Pneumatic Tools)
- John MacLennan and Co
- John MacLennan and Co
- John Marland and Son
- John Mayers Sons and Co
- John Mayers, Sons and Co
- John Oakey and Sons
- John Ogilvy and Co
- John Roberts and Co
- John S. Morris and Son (Oils)
- John Shaw
- John Short
- John Smith and Co (Derby)
- John Spencer
- John Spencer and Sons (1928)
- John Taylor and Sons (Bolton)
- John Taylor Dunford and Co
- John Taylor, Dunford and Co
- John Thompson Motor Pressings
- John Tonks and Co
- John Turner and Sons (Wire Works)
- John Vessey and Sons
- John W. Miller and Son
- John Wood and Sons (Wisewood)
- Johnson and Phillips
- Johnson and Son, Manufacturing Chemists
- Johnson Lovick and Co
- Johnsons (of Godalming)
- Jonas and Colver (Novo)
- Jones and Sons
- Jones, Burton and Co
- Joseph Bradbury and Sons
- Joseph Cookson
- Joseph Mason and Co
- Joseph Nichols and Son
- Joseph Parks and Son
- Joseph Sankey and Sons
- Joseph Tomey and Sons
- Joseph W. Caddick
- Joshua Kershaw and Co (Stockport)
- Joshua Rea and Sons
- Julius Pintsh, A.G.
- Junkers Flugzeug und Motorenwerke, A. G.
- Junkers Flugzeug-und-Motorenwerke, A. G.
- K. A. Whittome
- K. Johnson and Sons
- K. L. G. Sparking Plugs
- K. L. M. (Royal Dutch Air Lines) (Czechoslovakia)
- K. L. M. (Royal Dutch Air Lines) (Egypt)
- K. L. M. (Royal Dutch Air Lines) (Netherlands East Indies)
- K. N. I. L. M. (Koninklijke Nederlandsch-Indische Luchtvaart Masstschappij)
- K. Pyman
- Kalbitum Paint Co
- Kaloroil Burners
- Kaloroil Burners (Waste Oil)
- Kasenit
- Kawanisi Kokuki Kabusike Kaioya
- Kawasaki Dockyard Co
- Kay Gyroplanes
- Kayser Ellison and Co
- Kayser, Ellison and Co
- Keelavite Co
- Keighley Bolt and Nut Works
- Keighley Fan and Motor Co
- Kellett Autogiro Corporation
- Kelvin, Bottomley and Baird
- Kenbar Electrical Co
- Kenilworth Manufacturing Co
- Kenneth, Brown and Prentice
- Keystone Paint and Varnish Co
- Kibraz Blow Lamp and Motor Accessory Co
- Kings Cross Truck Co
- Kinner Airplane and Motor Corporation
- Kirkstall Forge
- Kitson Insulations
- Kleine Co
- Knowsley Cast Metal Co
- Kodak
- Koninklijke Luchtvaart Masstschappij voor Nederland en Kolonien N. V. (K. L. M.) (Royal Dutch Air Lines)
- Koninklijke Maatschappij de Schelde
- Koolhoven Vliegtuigen
- Korect Depth Garage Co
- Krayser Ellison and Co
- Kronfeld
- Kryn and Lahy (1928)
- Kurt Erlach
- L. A. K. Halcomb
- L. A. N. (Linea Aerea Nacional)
- L. A. N. E. P.
- L. A. R. E. S. (Roumanian State-operated Airlines)
- L. A. Rumbold and Co
- L. and G. Fire Appliance Co
- L. Cameron and Son
- L. Guinness, M. P.
- L. H. Newton and Co
- L. H. Riddell
- L. J. Rimmer
- L. J. Turner
- L. Marr
- L. Nicklin
- L. P. S. Electrical Co
- L. R. D. Beck
- L. Robinson and Co
- L. W. Tools Co
- L. Weekes (Luton)
- L. Weston
- L. Whitaker and Sons
- L’Aero Club Royal de Belgique
- L’Angence General des Moteurs “Ava”
- La Societe Francaise Hispano-Suiza
- La Societe Industrielle d’Aviation Latecoere
- Lacab. Les Ateliers de Constructions Aeronautiques Belges
- Lachowsky
- Lactocol
- Lacy-Hulbert and Co
- Lady Apsley
- Lady Blanche Douglas
- Lady Loch
- Lake and Elliot
- Lambert Aircraft Corporation
- Laminated Wood Products
- Lancashire Cotton Waste Co
- Lancashire Wire Co
- Lancegaye Safety Glass (1934)
- Landsdowne Varnish and Enamel Co
- Lang Propellers
- Lansdowne Varnish and Enamel Co
- Laurence, Scott and Electromotors
- Lawden and Poole
- Lawrence Haggerty and Co
- Lawrence W. Brown Aircraft Co
- Lawton (Successors)
- The Laycock Engineering Co
- Laystall Motor Engineering Works
- Lea and Son
- Lead Wool Co
- Leathercraft of Malvern (J. H. Stephens)
- Lee and Wilkes
- Leeds Piston Ring and Engineering Co
- Leichtflugzeugbau Klemm, G. m. b. H.
- Leonard Dutton and Sons
- Les Aterliers de Construction du Nord de la France et des Mureaux (A.N.F.)
- Les Etablissements Lipton
- Leslie Dixon and Co
- Lewis Berger and Sons
- Lewis Dixon and Son
- Lewis Spring Co
- Leyland and Birmingham Rubber Co
- Lienea Aereas Mineras, S. A.
- Light Production Co
- Lightalloys
- Lightalloys, Alpax Works
- Light-Metal Forgings
- Lignes Aeriennes Nord Africaines (L.A.N.A.)
- Ligue Aeronautique de France
- Lilienthal-Gesellschaft fur Luftfahrtforschung
- Limmer and Trinidad Lake Asphalt Co
- Limpet Co
- Lincolnshire Flying Services
- Lindsay-Neale Aviation Co
- Lineas Aereas Merida-Payo Obispo
- Lion Engineering Co (Birmingham)
- Lion Engineering Son (Birmingham)
- Lion Spring Co
- Lionel Robinson and Co
- Liquid Measurements
- Lissen
- Lisson Aircraft and Precision Engineering Co
- Lithanode Co
- Liverpool Electric Cable Co
- Liverpool Radiator Co
- Llewellins Machine Co
- Llewellyn Ryland and Co
- Lloyd Aereo Boliviano
- Lloyds and Co (Letchworth)
- Lobitos Oilfields
- Locke, Spier and Co (1928)
- Lockheed Hydraulic Brake Co
- Lodge Plugs
- London Aluminium Co
- London and Midland Steel Scaffolding Co
- London Battery and Cable Co
- London Electric Wire Co and Smiths
- London Emery Works Co
- London Plywood and Timber Co
- London Emery Works Co
- Lorant and Co
- Lord Furness
- Lord G. N. Douglas-Hamilton
- Lord M. Douglas-Hamilton
- Lord Sempill
- Lord Willoughby de Broke
- Louis Bamberger and Sons
- Lt.-Col. A. Hamilton Gault, D.S.O.
- Lubelska Wytwornia Samolotow
- Lubrication Specialists
- Lubricine Oil Co
- Luis Melgoza
- Luke and Spencer
- Luke Turner and Co
- Lumsden Machine Co
- Luscombe Airplane Corporation
- Luton Aircraft
- Luvax
- Luxfer
- Luxury Air Tours
- Lydbrook Chemical Co
- M. and C. Switchgear
- M. C. Harley
- M. C. L. and Repetition
- M. E. King
- M. G. Christie
- M. G. Lazaro and A. L. Bieber
- M. K. Electric
- M. L. Curtis
- M. Maxwell
- M. N. Mavrogordato
- M. R. C.
- M. Sassoon
- M. W. Dunscombe
- M. W. Woods
- M. Yates and Sons
- Maatschappij voor Vliegtuigbouw N. V.
- MacArthur and Jackson
- MacEcher and Co
- Macfarlane Engineering Co
- Macnab and Co
- MacRobertson Miller Aviation Co
- Magensium Castings and Products
- Magnesium Elektron
- Magnolia Anit-Friction Metal Co of Great Britain
- Magnolia Anti-Friction Company of Great Britain
- Magyar Legiforgalm Reszvenytarsasag (Hungarian Airtraffic Co)
- Maison Sarole, S.A.
- Major and Co
- Major G. W. G. Allen
- Major H. Musker
- Major J. C. Savage
- Major J. E. D. Shaw
- Major, Robinson and Co
- Major-General Viscount Gort
- Malcolm and Farquharson
- Malling Aviation
- Mallock-Armstrong Ear Defender Co
- Manchester Paint and Varnish Co
- Manfred Weiss Flugzeug und Motorenfabrik A. G.
- Manfred Weiss Flugzeug und Motorenfabrik Aktiengesellschaft
- Manuchuria Airtransport Co
- Manufacturers Aircraft Association
- Marconis Wireless Telegraph Co
- Markham and Co
- Marquess of Donegall
- Marquess of Douglas and Clydesdale
- Marquess of Dufferin and Ava
- Marsh Brothers and Co
- Marshall Osborne and Co
- Marshall, Sons and Co (Successors)
- Marshall, Sons and Company
- Marshalls Flying School
- Marshalls Flying Services
- Martin-Baker Aircraft Co
- Mason, Seeley and Co
- Massa Sparking Plug Co
- Masson Seeley and Co
- Matchett and Martineau
- Matthew T. Shaw and Co
- Matthew Wells and Co
- Maurice B. Fraser
- Mawdsleys
- May and Baker
- Maybach-Motorenbau, G. m. b. H.
- Mayo Composite Aircraft Co
- McGowan, Wild and Co
- McGraw-Hill Publishing Co
- McGregor and Co
- McKechnie Brothers
- Mechanism
- Mechanism (H. C. Peirce)
- Mechans
- Medway Synthetic Products
- Melvin Brothers
- Menasco Manufacturing Co
- Menno Compressed Air Greasecup Co
- Mercury Aircraft
- Meredith and Co
- Merrick and Heath
- Merryweather and Sons
- Merseyside Aero and Sports Co
- Merseyside Air Park
- Messier Aviation Engineering Co
- Metal Industries
- Metal Propellers
- Metal Sprayers
- Metal Structures
- Metallic Seamless Tube Co
- Metals
- Metropolitan Plywood Co
- Metropolitan-Vickers Electrical Co
- Meynell and Sons
- Mica Lubricant Co
- Mica Products
- Micanite and Insulators Co
- Middlesex Paint and Lacquer Co
- Midland Airways
- Midland Electric Installation Co
- Midland Electric Manufacturing Co
- Midland Electric Wire Co
- Midland Electrical Manufacturing Co
- Midland Expanded Metal Co
- Midland Fan Co
- Midland Flexible Metallic Tubing Co
- Midland Flexible Tubing Co
- Midland Metals (Wolverhampton)
- Midland Motor Cylinder Co
- Midland Sheet Metal Works
- Miles Ashworth
- Military Aircraft Corporation
- Miller, Rayner and Haysom
- Mills Equipment Co
- Milne and Longbottom
- Milne and Longbottom (R. Milne)
- Minimax
- Minister for Air (Germany)
- Mint, Birmingham
- Miralite
- Misr Airwork, S. A. E.
- Miss C. M. de Reyes
- Miss E. L. M. Barbour
- Miss J. E. Giles
- Miss J. G. Batten
- Miss M. S. D. Wilson
- Miss R. Rees
- Misses M. and S. Glass
- Mitchell, Shackleton and Co
- Mitsubishi Jukogyo Kabushiki Kaisha (Mitsubishi Heavy-Industries)
- Mixtrol Oil Products of Great Britain
- Model Aircraft Stores
- Model Aircraft Supplies
- Model Transport Co
- Models Manufacturing Co
- Mollart Engineering Co
- Moore and Bird
- Morgan Ebonite Co
- Morgan, Owen and Taylor
- Morris and Co (Chester)
- Morris and Ingram
- Morris and West
- Mosers
- Moss Brothers Aircraft
- Moss Brothers and Co
- Moss Gear Co
- Mosses and Mitchell
- Moteurs Aubier and Dunne
- Motor and Aviation Insurance Brokers
- Motor Components (Birmingham)
- Moulded Products
- Mouldrite
- Mountfield Rubber Co
- Mountford Rubber Co
- Mountsorrel Tarred Macadam Co
- Mrs B. Macdonald
- Mrs D. M. Wills
- Mrs E. M. Robinson
- Mrs Howard-Jones
- Mrs I. J. Goldspink
- Mrs L. H. Gibbs
- Mrs M. K. Wilberforce
- Muegyetemi Sportrepulo Egyesulet (Sport Flying Association of the Technical University)
- Murex Welding Processes
- Murray Aeronautical Corporation
- Musgrave and Co
- N. A. Blandford-Newson
- N. A. C. A.
- N. Greening and Sons
- N. H. Knipe
- N. M. Gibbins
- N. S. Roberts
- N. S. Seth
- N. V. Eerste Nederlandsche Indische Vliegtuigenfabriek
- Nakajima Aircraft Works
- Nalder Brothers and Thompson
- Nash and Thompson
- National Air Transport
- National Aircraft Factory
- National Airline System
- National Airways
- National Benzole
- National Benzole Co
- National Bituminous Products
- National Fire Protection Co
- National Parks Airways
- National Plywood Corporation
- National Radio Service Co
- Naval Air Establishment
- Navy Aircraft Factory
- Negretti and Zambra
- Nesta
- Neuchatel Asphalte Co
- New Cransley Iron and Steel Co
- New Croydon Rubber Co
- New Pelapone Engine Co
- New Process Welders
- New Zealand Aero Club
- Newalls Insulation Co
- Newport and South Wales Tube Co
- Newton and Nicholson
- Newton Brothers (Derby)
- Nissen Buildings
- Nitralloy
- Nitsche and Gunther British Optical Co
- Nivex Instrument and Gauge Co
- Nobel Chemical Finishes
- Nobles and Hoare
- Noel Paton
- Nohab Flygmotorfabriker
- Noorduyn Aircraft
- Normal Propeller Co
- Norman Edgar Western Airways
- Norman Electrical Co
- Norman Engineering Co
- Normand Electrical Co
- Norrington and Landon
- Norsk Aero Club
- North American Aviation
- North British Chemical Co
- North Queensland Airways (Pty.)
- North Western Anglo-Swedish Electric Welding Co
- North-Eastern Airways
- Northern Aircraft Products
- Northern Airways
- Northern Aluminium Co
- Northern and Scottish Airways
- Northern Model Aircraft
- Northern Model Aircraft Co
- Northey-Boyce Rotary Engineering Co
- Northwest Airlines
- Nottingham Airport
- Nuckey-Scott and Co
- Nunan and Stove
- Nuneaton Engineering Co
- Nuts and Bolts (Darlaston)
- O. Comitti and Son
- O. E. C.
- O. L. Richards
- O. S. Baker
- O. W. Fulcher and Co
- Oddie, Bradbury and Cull
- Oesterreichische Luftverkehrs Aktiengesellschaft
- Oesterreichischer Aero-Club
- Oficinas Gerais de Material Aeronautica
- Oldham and Sons
- Oldham Welding and Central Motors
- Oliver Pragnell and Co
- Oliver V. Beckerlegge
- Olley Air Service
- Omes
- Omies
- Opperman Gears
- Oriental Tube Co
- Ormistons Alumina
- Osoaviachim
- Ostschweiz, Aero Gessellschaft
- Overhead
- Owen Brothers and Co
- Owen George Endicott Roberts
- Owen Rubery and Co
- Ox-Hide Banding Co
- Ozalid Co
- Ozalid Company
- P. B. Deviator
- P. B. Snowdon and Co
- P. C. Henderson
- P. Dunkerley
- P. E. Buck
- P. E. Matthews and Sons
- P. G. Aldrich-Blake
- P. G. Allday and Co
- P. H. Jackson and Co
- P. Levasseur
- A. P. Lundberg and Sons
- P. P. S. Pratt
- P. Priest, F. Lawton and C. Brooke
- P. R. Burton and V. M. Desmond
- P. Randolph
- P. Richardson and Son
- P. Stobie and Co
- P. T. Eckersley
- Pahl Brothers
- Pak Parachute Co
- Palmer Tyre
- Palmer-Browne Lubricator Co
- Pan American Airways (Grace)
- Pan-Aero Pictures
- Panair do Brazil, S.A.
- Pan-Amercian Airways (Ecuador)
- Pan-American Airways
- Pan-American Airways (British Honduras)
- Pan-American Airways (Colombia)
- Pan-American Airways (Costa Rica)
- Pan-American Airways (Cuba)
- Pan-American Airways (Guatemala)
- Pan-American Airways (Honduras)
- Pan-American Airways (Mexico)
- Pan-American Airways (Nicaragua)
- Pan-American Airways (Panama)
- Pan-American Airways (Salvador)
- Pan-American Airways (U.S.A.)
- Pan-American Airways (Uruguay)
- Pan-American Airways (Venezuela)
- Pan-American Grace Airways (Peru)
- Panstwowe Zaklady Lotnicze W. Warszawie
- Panstwowe Zaklady Lotnicze W. Warszawie (Late Polsky Zaklady Skody)
- Parker, Winder and Achurch
- Parnall Aircraft
- Pasped Aircraft Co
- Patent Motor Products Co
- Paths and Ways
- Paul Boulton Aircraft
- Payne and Griffiths
- Pearce Signs
- Pegson
- Penney and Porter (1932)
- Pennsylvania Aircraft Syndicate
- Pennsylvania Airlines
- Percival Aircraft
- Perfecta Motor Equipments
- Perry and Fudge
- Perry Bar Metal Co
- Personal Airways
- Peruvian Cotton Dusting Co
- Peruvian National Air Lines
- Peter Brotherhood
- Peter Stobie and Co
- Peto and Radford
- Petro-Flex Tubing Co
- Philco Radio and Television Corporation of Great Britain
- Philip Kirkup and Co
- Philip Wilkinson and Sons
- Philippine Aerial Taxi Co
- Philips Lamps
- Phillips and Powis
- Phillips and Powis Aircraft
- Phillips and Rabone
- Phillips and Sons (Electrical)
- Phillips and Sons Electrical
- Phillips Telescopic Taps
- Phoenix Steel Tube Co
- Phosphor Bronze Co
- Pidgen Brothers
- Piercy and Co
- Piero Magni Aviazione, S. A. I.
- Piftin
- Pinchin, Johnson and Co
- Pines Airways
- Pirelli-General Cable Works
- Pitcairn Autogiro Co
- Pitter Gauge and Precision Tool Co
- Plane Advertising
- Plant C. H. (Formerly Kalinin)
- Plastilume Products
- Platt Brothers and Co
- Platts Split Packing Co
- Plessey Co
- Plymouth Airport
- Pneumatic Tools
- Pobjoy Airmotors and Aircraft
- Pocklington and Johnson
- Podlaska Wytwornia Samolotow, S. A.
- Polskie Linje Lotnicze (L. O. T.)
- Pomona Rubber Co
- Pooley and Austin
- Poppe Rubber and Tyre Co
- Popular Flying
- Portsmouth, Southsea and I. O. W. Aviation
- Portsmouth, Southsea and Isle of Wight Aviation
- Postans, Morley Brothers and Birtles
- Poulton Self and Lee
- Power Contracts (Batwin)
- Power Flexible Tubing Co
- Power Plant Co
- Pratt and Whitney Aircraft
- Prellers and Sampsons Belting Co
- Premier Aluminium Castings Co
- Premier Electric Control Co
- Premiers Chantiers Serbe de Constructions Aeronautiques G. Rogojarsky S. A.
- Prentice
- Prescot Clock and Mechanism Co
- Presspahn
- Prices Patent Candle Co
- Priest, Rowland
- Proctor, Johnson and Co
- Purimachos
- Puttnam Aircraft Co
- Pymore Mill Co
- Pyrene Company
- Pytchley Autocar Co
- Qantas Empire Airways
- Qualcast
- Quicktho (1928)
- Quiggin and Co
- R H. Cook and Co
- R. A. Dyson and Co
- R. A. Lister and Co
- R. A. Mitchell Junior
- R. A. Munder
- R. and J. Dick
- R. and J. Park
- R. and J. Rankin
- R. Anderson, Son and Co
- R. B. Gilliat
- R. B. Pullin and Co
- R. Branston
- R. Bullock
- R. Butler
- R. C. Presland
- R. C. Ramsay
- R. Cadisch and Sons
- R. Cruickshank (Cellulose)
- R. Dundas
- R. E. Gardner
- R. E. Horrox
- R. E. L. Beere
- R. E. Sharples
- R. F. D. Co
- R. G. Davies
- R. G. Doig
- R. H. Collier and Co
- R. H. Cook and Co
- R. H. Neal and Co
- R. H. Neal and Co (Excavating Machinery)
- R. H. Patterson and Co
- R. H. Stocken
- R. H. Stocken M.I.Ae.E.
- R. H. Vaughan and Co
- R. I. W. Protective Products Co
- R. Ince
- R. J. Bird
- R. J. Coley
- R. J. Coley and Atkinson
- R. J. Edwards and Co
- R. J. Pattinson
- R. K. Dundas
- R. K. L. S. Mainwaring
- R. Kearlsey and Co
- R. L. Thorn
- R. M. Miller and Co
- R. N. Birley
- R. O. Shuttleworth
- R. P. Hartley
- R. Proctor
- R. Riley
- R. S. H. Callingham
- R. S. Thacker and Co
- R. T. Boyd
- R. W. Anderson and Sons
- R. W. Coan
- R. W. Munro
- Radio Transmission Equipment
- Ragosine Oil Co
- Railway Air Services
- Ralph Richardson
- Ramage, Whitehead and Co
- Ramsgate Airport
- Ranalah
- Randle Radiators
- Ransome and Marles Bearing Co
- Ransomes and Rapier
- Ransomes, Sims and Jefferies
- Ransomes, Sims and Jefferies (Preparation and Maintenance)
- Rapid Magnetting Machine Co
- Ratcliffs (Great Bridge)
- Rateau Engineers
- Ravenhose
- Rawsthornes (Bolton)
- Raybestos Belaco
- Raynoil Maps
- Read and Campbell
- Reale Unione Nazionale Aeronautica
- Rearwin Airplanes
- Reavell and Co
- Reay Brass Foundry Co
- Reay Gearworks
- Record Electrical Co
- Redditch Garages
- Redditch Spring Co
- Redferns Rubber Works
- Redline-Glico
- Redpath Brown and Co
- Redwing Aircraft Co
- Reid and Sigrist
- Reliance Sheet Metal Works
- Reliance Sheetmetal Works
- Renard. Constructions Aeronautiques G. Renard
- Revo Electric Co
- Reynolds and Bradwell
- Reynolds Tube Co
- Rheostatic Co
- Rhodes, Brydon and Youatt
- Rhodes, Gill and Co
- Rhodesia and Nyasaland Airways (R.A.N.A.)
- Ribbesford Co
- Richard Bell and Co
- Richard C. Gibbins and Co
- Richard Cooper and Son (Wolverhampton)
- Richard Davies Leather Co
- Richard Klinger
- Richard Lloyd and Co
- Richard W. Carr and Co
- Richard Whiffen
- Richard Whiffin
- Richards (Leicester)
- Rider-Clarl Aircraft Corporation
- Ridgacre Foundry Co
- Rijks Studie Dienst voor de Luchtvaart
- Riley Aircraft
- Ripaults
- Robert Ingham, Clark and Co
- Robert Jenkins and Co
- Robert Kearsley and Co
- Robert Proctor
- Robert Rigby
- Robert Watson and Co
- Roberto L. Miranda
- Roberts, Black and Co
- Roberts, Black Co
- Robertson Coolers
- Robinson and Cleaver
- Robinson and Kershaw
- Robson and Coleman
- Robson and Colman
- Rockhampton Aerial Services
- Rogers-Jenkins and Co
- Rollason Aircraft Service
- Rolls-Royce
- Ronald Trist and Co
- Rooney and Sons
- Rooney and Sons
- Rose Aeroplane and Motor Co
- Rose, Downs and Thompson
- Ross
- Ross and Robinson
- Rotax
- Rotherham and Sons
- Rotherham Forge and Rolling Mills Co
- Rotunda
- Rowland Priest
- Rowland Rawlinson
- Royal Aero Club of Sweden
- Royal Aeronautical Society
- Royal Army Aircraft Factory (Denmark)
- Royal Dutch Air Line (K. L. M.)
- Royal Dutch Air Lines (K. L. M.) (Greece)
- Royal Meteorological Society
- Royal Naval Dockyard (Denmark)
- Royal Netherlands Aero Club
- Royal Yugoslav Aero Club
- Rubery, Owen and Co
- Runbaken Products
- Russell Brothers (Walsall)
- Russells Oil Co
- Russells Oils Co
- Russian Oil Products
- Rustless Iron Co
- Ruston and Hornsby
- Rutas Aereas Occidentales, S. A.
- S. A. Aeroplani Caproni
- S. A. Industrie Meccaniche e Aeronautiche Meridionali
- S. A. R. T. A. (S. A. Roumaine de Transport Aerien)
- S. A. Stablilimenti Farina
- S. A. Yorke
- S. Appleyard and Co
- S. B. Cliff
- S. Crawshaw and Cons
- S. De Saulles and Son
- S. Dixon and Son
- S. E. C. Pearson
- S. E. Norris and Co
- S. F. Bowser and Co (London)
- S. G. Brown
- S. Gleave
- S. Gregson and Sons
- S. Hawley
- S. J. Green and Co
- Saul D. Harrison and Sons
- S. Kenneth Davies
- S. L. Dodwell
- S. Mills and Co
- S. N. Jones
- S. P. Tyzack
- S. Pickering and Son
- S. Redfern and Co
- S. Russell and Sons
- S. T. Lowe
- S. Tyzack and Son
- S. U. Carburetter and Co
- S. U. Carburretter Co
- S. V. Appleby
- S. Wolf and Co
- S.A.B.C.A. Societe Anonyme Belge de Constructions Aeronautiques
- Sackville
- Safety Products
- Sagar-Richards
- Salford Electrical Instrument
- Salvolene Lubricants
- Sam Reid
- Sampson, Law, Marston and Co
- Samuel Denison and Son
- Samuel Fox and Co
- Samuel Greenwood and Sons
- Samuel Harris
- Samuel Heath and Sons
- Samuel Jones and Co
- Samuel Marsden and Son
- Samuel Mercer and Co
- Samuel Netherwood and Sons
- Samuel Wills and Co
- Sandemans Varnish
- Sanderson and Robinson
- Sanderson Brothers and Newbould
- Sandvik British Agency
- Santon
- Saul D. Harrison and Sons
- Saunders-Roe
- Schlupmannsche Industrie und Handelsgesellschaft m. b. H.
- Sciaky Electric Welding Machines
- Thorn and Hoddles
- Scientific Glass Blowing Co
- Scintilla
- Scott Brothers
- Scott Laurence and Electromotors
- Scott Motor Cycle Co
- Scott Motors (Saltaire)
- Scottish Aircraft and Engineering Co
- Scottish Aircraft Engineering Co
- Scottish Eastern Aircraft Services
- Scottish Stamping and Engineering Co
- Seapak Insulation Co
- Seattle-Victoria Air Mail
- Secretary of State for Air
- Security National Aircraft Corporation
- Selas Gas and Engineering Co
- Self-Priming Pump and Engineering Co
- Selson Machine Tool Co
- Serck Radiators
- Service de la Navigation Aerienne de Madagascar
- Servicios Aereos del Norveste, S. A.
- Servis Recorders
- Sheepbridge Stokes Centrifugal Castings Co
- Sheffield and Hallamshire Hack Saw Co
- Sheffield Supply Co
- Sheffield Twist Drill and Steel Co
- Shell-Mex and B. P.
- Shetack Tool Works
- Shipman (Sales)
- Short and Harland
- Short and Mason
- Short Brothers
- Short Brothers (Bedford and Rochester)
- Short Brothers (Rochester and Bedford)
- Siddall and Hilton
- Sidney J. Mortimer and Co
- Siebe, Gorman and Co
- Siemens Brothers and Co
- Siemens Electric Lamps and Supplies
- Siemens Electrical Lamps and Supplies
- Siemens-Schuckert
- Siemens-Schuckert (Great Britain)
- Silentbloc
- Sifton, Praed and Co
- Sigmarine Co
- Sikorsky Aircraft
- Silentbloc
- Silvertown Lubricants
- Simmonds Accessories
- Simmonds Aerocessories
- Simmonds and Stokes
- Simmonds Development Corporation
- Simmons and Hawker
- Simms Motor Units
- Simplifix Couplings
- Simpson (Piccadilly)
- Singleton, Flint and Co
- Sir A. Beit
- Sir C. A. Wrench
- Sir C. Rose
- Sir Derwent Hall Caine
- Sir G. Lewis
- Sir George Godfrey and Partners
- Sir Issac Pitman and Sons
- Sir James Laing and Sons
- Sir K. I. Crossley Bart
- Sir Philip Sassoon
- Sir W. G. Armstrong Whitworth Aircraft
- Sir W. H. Bailey and Co
- Sir William Firth
- Skefko Ball Bearing Co
- Skywriting
- Slater and Crabtree
- Slick Brands
- Small Power Dynamo and Motor Co
- Smethwick Drop Forgings
- Smethwick Stamping Co
- Smethwick Stampings
- Smith and Rodger
- Smith Brothers and Co
- Smith Brothers and Co (Hyson)
- Smith-Clayton Forge
- Smiths Aircraft Instruments
- Snowdon, Sons and Co
- Sociedad Colombo-Alemana de Transportes Aereos (SCADTA)
- Sociedade Aero-Portugueza
- Societa Aeronautica Italiana (S. A. I.)
- Societa Anonima Aero-Espresso Italiana
- Societa Anonima Alfa-Romeo
- Societa Anonima F.I.A.T.
- Societa Anonima Piaggio and C.
- Societa Gabardini
- Societe Aeronautique du Sud-ouest
- Societe Aeronautique Francaise
- Societe Anonima Avio-Linee Italiana
- Societe Anonyme Belge d’Exploitation de la Navigation Aerienne (S.A.B.E.N.A.)
- Societe Anonyme de Ateliers d’Aviation Louis Breguet
- Societe Anonyme des Anciens Etablissements Panhard et Levassor
- Societe Anonyme des Etablissements Emile Regnier
- Societe Anonyme des Usines Renault
- Societe Anonyme l’Aile Volante
- Societe Anonyme Loire-Nieuport
- Societe Anonyme Nieuport-Astra (Group Loire-Nieuport)
- Societe Anonyme Omnium Metallurgique et Industriel
- Societe Anonyme Pour la Fabrication et l’Exploiatation des Avions Roab
- Societe des Aeroplanes Henry Potez
- Societe des Avions Bernard
- Societe des Avions H. M. et D. Farman
- Societe des Moteurs et Automobiles Lorraine
- Societe des Moteurs Gnome-et-Rhone
- Societe des Moteurs Salmson
- Societe Francais de Fabrication Aeronautique
- Societe Francaise d’Aviation Nouvelle
- Societe Francaise de Constructions Aeronautiques
- Societe Hellenique de Communications Aeriennes, S. A.
- Societe Italiana Ernesto Breda
- Societe Kellner-Bechereau
- Societe Provencale de Constructions Aeronautiques
- Societete Anonima Industria Aeronautica Romana
- Society of British Aircraft Constructors
- Sofnol
- Solar Refining Co
- Solenoid Regulator Co
- Solignum
- South African Airways (South African Railways and Harbours)
- South Durham Steel and Iron Co
- South Western Aviation Corporation
- South Western Brass Foundry
- Southwark Manufacturing Co
- Spartan Air Lines
- Spartan Aircraft
- Spauldings
- Specialliod
- Speedometer Supply Co
- Speedwell Gear Case Co
- Spencer Chapman and Messel
- Spencer Wire Co
- Spensall Screw and Bolt Co
- Sperry Gyroscope Co
- Spiral Tube and Components Co
- Spiro Ball Bearing Co
- Splintex-Newtex and Safety Glass
- Splintex-Newtex Safety Glass
- Spring Washers
- Spry and Holman
- Spurrier Glazebrook and Co
- Squadran Leader H. Peake
- Squadran Leader N. C. Ogilvie-Forbes
- Square Grip Reinforcement Co
- St. Albans Rubber Co
- Staffordshire Airplanes
- Stampe-et-Vertongen. J. Stampe et M. Vertongen
- Stampings Alliance
- Standard Insulator Co
- Standard Telephones and Cables
- Standard Valves
- Standard Wire Co
- Stanley Earle and Co
- Stanley Engineering Co
- Stearman-Hammond Aircraft Corporation
- Stearn Electric Co
- Steel Band Conveyor and Engineering Co
- Steel Ceilings
- Steel Conduit Co
- Steel Construction Co
- The Steel Nut and Joseph Hampton
- Steel Nut and Joseph Hampton
- Steel Scaffolding Co
- Steel Stampings Co
- Steel Tube and Conduit Co
- Stephen Gillett and Co
- Stephen Seal, Son and Co
- Stephens Belting Co
- Sterling Metals
- Sterling Varnish Co
- Sternol
- Stewarts and Lloyds
- Stokes Castings
- Stone and Sons
- Stones, Wilkinson and Co
- Stothert and Pitt
- Stourbridge Rolling Mills
- Strand and Interchangeable Signs
- Strand Electric and Engineering Co
- Stream-Line Filters
- Streetly Manufacturing Co
- Sturge and Co
- Suffolk Iron Foundry (1920)
- Sunderland Engineering Equipment Co
- Sunderland Forge and Engineering Co
- Super Radio Co (Bradford)
- Superflexit
- Supermarine Aviation Works
- Supermarine Aviation Works (Vickers)
- Super-Tools
- Surrey Flying Services
- Surtees Auto Marine Aircraft
- Swift Levick and Sons
- Swift, Levick and Sons
- Swindell and Co
- Swinnerton and Co
- Swissair, Schweizerische Luftverkehr, A. G.
- Sylicum Pistons
- Sylvan Lubricants Co
- Syndicaro Condor, Limitada
- Syndicat des Transports Aeriens du Katanga
- Syndicator Condor
- Sywell Aerodrome
- T. A. K. Aga
- T. C. Howden and Co
- T. C. L. Westbrook
- T. C. Smith and Co
- T. D. Robinson and Co
- T. F. and J. H. Braime
- T. H. Gill and Son
- T. H. MacDonald
- T. H. Newsome and Co
- T. H. Wilson
- T. J. Priestman
- T. Leach and Son
- T. M. Birkett and Sons
- T. Nigel Tangye
- T. Price and Son (Stampers)
- T. Procter
- T. R. Parry and Co
- T. R. Paxton and Son
- T. Rowbotham and Co
- T. Wheeler
- T. Wilson and Son
- Talbot Stead Tube Co
- Tammerfors Linne-Och Jern-Manafaktur, A. B.
- Tannoy Products
- Tannoy Products (Guy R. Fountain)
- Taskers of Andover (1932)
- Tata Sons
- Tatra Works
- Taylor and Challen
- Taylor and Petters
- Taylor Brothers
- Tecalemit
- Technical Improvements
- Technical Lights and Equipment
- Technical Platings
- Tees Side Bridge and Engineering Works
- Telcalemit
- Telegraph Construction and Maintenance Co
- Telephone Manufacturing Co
- Televel
- Telford, Grier, Mackay and Co
- Tempered Spring Co
- Temple Press
- Tenbury Baths Co
- Texas Oil Co
- Thanet Aviation
- The A C-Sphinx Sparking Plug Co
- The A. C. E. Corporation
- The Abies Battery Co (1927)
- The Accurate Recording Instrument Co
- The Acme Electrical Manufacturing Co
- The Aerial Photographic Co
- The Aero Piston Ring Co
- The Aerograph Co
- The Aeronautical and Panel Plywood Co
- The Aeronautical Corporation of America
- The Agra Engineering Co
- The Aichi Tokei Denki K. K. (The Aichi Watch and Electric Machinery Co)
- The Airplane Division of the Ford Motor Co
- The Airscrew Co
- The Albion Foundry
- The Albion Oils Co
- The Alliance Petroleum Marketing Co
- The Allison Engineering Co
- The Aluminium Plant and Vessel Co
- The Amalgams Co
- The American Eagle-Lincoln Aircraft Corporation
- The Anglo-Bosphorus Oil Co
- The Anti-Attrition Metal Co
- The Arora Co
- The Atlas Carbon and Battery Co
- The Atlas Metal and Alloys Co
- The Austin Motor Co
- The Autogiro Company of America
- The Automotive Engineering Co
- The Barton Rivet Co
- The Bell Rock Belting Co
- The Bellanca Aircraft Corporation
- The Bifurcated and Tubular Rivet Co
- The Birmingham Belting Co
- The Birmingham Garages
- The Birmingham Mint
- The Blackburn Aircraft
- The Boeing Aircraft Co
- The Boness Iron Co
- The Bridge Foundry Co
- The Bristol Aeroplane Co
- The British Air Transport
- The British Cystoscope Co
- The British Ebonite Co
- The British Hose and Appliances Co
- The British Piston Ring Co
- The British Power Boat Co
- The British Rola Co
- The British Scandinavian Airways
- The British Screw Co
- The British Thermit Co
- The British Thomson-Houston Co
- The British Trolley Track Co
- The British Xylonite Co
- The Bromley-Langton Electric Wire and Insulator Co
- The Builders Copper Tube Supply Co
- The Buma Engineering Co
- The Cairns Aircraft Corporation
- The Calorizing Corporation of Great Britain
- The Carbomizing Corporation of Great Britain
- The Carborundum Co
- The Castleton Steam Packing Co
- The Caxton Steel Co
- The Cement Marketing Co
- The Central Aerp Hydrodynamics Institute
- The Cessna Aircraft Co
- The Chemical and Insulating Co
- The Chesterfield Tube Co
- The Chloride Electrical Storage Co
- The Churchill Machine Tool Co
- The City Sheet Metal Works
- The Cleveland Oil Co
- The Clews Petersen Piston Ring and Engineering Co
- The Clyde Alloy Steel Co
- The Cockatoo Dockyard Engineering Co
- The College of Aeronautical Engineering
- The Consolidated Aircraft Corporation
- The Consolidated Pneumatic Tool Co
- The Control of Air Transport (Guatemala)
- The Cookson Lead and Antimony Co
- The County Chemical Co
- The Coventry Magneto Co
- The Coventry Victor Motor Co
- The Cressall Manufacturing Co
- The Crusader Aircraft Corporation
- The Cunningham-Hall Aircraft Corporation
- The Curtiss Aeroplane and Motor Co
- The Curtiss-Wright Airplane Co
- The D. P. Battery and Co
- The Dargue Acetylene Gas Co
- The Darlington Wire Mills
- The Dart Spring Co
- The Davis Aircraft Corporation
- The De Havilland Aircraft Co
- The De Havilland Aircraft Pty
- The Dee Oil Co
- The Del Guerra Oilskin Manufacturing Co
- The Delta Metal Co
- The Denbigh Engineering Co
- The Deritend Stamping Co
- The Director of Air Services
- The Dominion Motor Spirit Co
- The Donovan Electrical Co
- The Douglas Aircraft Co
- The Dowson and Mason Gas Plant Co
- The Drayton Regulator and Instrument Co
- The Du Bois Co
- The Duke of Richmond and Gordon
- The Dunlop Rubber Co
- The E. M. Laird Airplane Co
- The Earl Dudleys of Round Oak Works
- The Edison Swan Electric Co
- The Educational Supply Association
- The Effingham Steel Works
- The Electric Construction Co
- The Electrical Apparatus Co
- The Electro Dynamic Construction Co
- The Euston Ignition Co
- The Exe Engineering Co
- The Eyre Smelting Co
- The Fahlin Aircraft Co
- The Fairby Construction Co
- The Fairchild Aircraft Corporation
- The Federal Factory
- The Ferro-Arc Welding Co
- The Firth Co
- The Firth Vickers Stainless Steels
- The Firth-Derihon Stampings
- The Flexible Shaft Manufacturing Co
- The Fordath Engineering Co
- The Fordpath Engineering Co
- The Forward Oil Co
- The Forward Radiator Co
- The Forward Sparking Plug Co
- The Foster Engineering Co
- The Frederick Crane Chemical Co
- The Fulham Pottery and Cheavin Filter Co
- The G. Q. Parachute Co
- The Gear Grinding Co
- The General Celluloid Co
- The General Electric Co
- The General Fire Appliance Co
- The Giro Aviation Co
- The Glacier Metal Co
- The Gledhill-Brook Time Recorders
- The Glenn L. Martin Co
- The Gloster Aircraft Co
- The Grumman Aircraft Engineering Corporation
- The Guiberson Diesel Engine Co
- The Harland Engineering Co
- The Helvetia Leather Co
- The Heston Aircraft Co
- The Hill Top Foundry Co
- The Hoffman Manufacturing Co
- The Honorable H. C. H. Bathurst
- The Honorable J. Y. Cunliffe-Lister
- The Honorable M. Aitken
- The Honourable A. E. Guinness
- The Honourable D. Fortescue
- The Honourable Drogo Montagu
- The Honourable J. D. Kemp
- The Hoyt Metal Co of Great Britain
- The Hughes Johnson Stampings
- The Improved Liquid Glues Co
- The Incandescent Heat Co
- The International Cotton Waste Co
- The Ioco Rubber and Waterproofing Co
- The Ishikawajima Aircraft Co
- The Kalbitum Paint Co
- The Kawasaki Dockyard Co
- The Keighley Bolt and Nut Works
- The Keighley Fan and Motor Co
- The Kenilworth Manufacturing Co
- The Kersons Manufacturing Co
- The Kinner Airplane and Motor Corporation
- The Kleine Co
- The L. and G. Fire Appliance Co
- The L. P. S. Electrical Co
- The L. W. Tools Co
- The Lancashire Wire Co
- The Lawrence Engineering and Research Corporation
- The Le Blond Aircraft Engine Corporation
- The Lead Wool Co
- The Leyland and Birmingham Rubber Co
- The Librex Lead Co
- The Limpet Co
- The Lion Spring Co
- The Lithanode Co
- The Lithuanian Army Aircraft Factory
- The Liverpool Electric Cable Co
- The Lockheed Aircraft Corporation
- The London Aluminium Co
- The London Plywood and Timber Co
- The Lumsden Machine Co
- The Macfarlan Engineering Co
- The Mallock-Armstrong Ear Defender Co
- The Marquess of Londonderry
- The Mayo Composite Aircraft Co
- The Metallic Seamless Tube Co
- The Mica Lubricant Co
- The Micanite and Insulators Co
- The Michigan Aero-Engine Corporation
- The Midland Electric Installation Co
- The Midland Expanded Metal Co
- The Midland Fan Co
- The Midland Motor Cylinder Co
- The Military Aircraft Factory
- The Model Aircraft Stores
- The Model Transport Co
- The Mollart Engineering Co
- The Morgan Ebonite Co
- The Moss Gear Co
- The N. V. Nederlandsche Vliegtuigenfabriek (Fokker)
- The Nakajima Aircraft Works
- The Neuchatel Ashpalte Co
- The New Croydon Rubber Co
- The Normand Electrical Co
- The North Western Anglo-Swedish Electric Welding Co
- The Northrop Corporation
- The Oriental Tube Co
- The Ox-Hide Banding Co
- The Packard Motor Car Co
- The Pak Parachute Co
- The Palmer Tyre
- The Patent Motor Products Co
- The Phoenix Steel Tube Co
- The Phosphor Bronze Co
- The Pitter Gauge and Precision Tool Co
- The Plessey Co
- The Pomona Rubber Co
- [[* The Poppe Rubber and Tyre Co
The Porterfield Aircraft Corporation]]
- The Power Flexible Tubing Co
- The Power Plant Co
- The Premier Electric Control Co
- The Pyrene Co
- The Pytchley Autocar Co
- The R. F. D. Co
- The R. I. W. Protective Products Co
- The Reay Gearworks
- The Record Electrical Co
- The Redditch Garages
- The Redditch Garages (Aviation Department)
- The Redditch Spring Co
- The Reverend C. D. C. Boulton
- The Revo Electric Co
- The Rheostatic Co
- The Rustless Iron Co
- The Ryan Aeronautical Co
- The S. U. Carburetter Co
- The Sandvik British Agency
- The Scientific Glassblowing Co
- The Scientific Research Institute of the Civil Air Fleet
- The Scottish Stamping and Engineering Co
- The Selas Gas and Engineering Co
- The Seversky Aircraft Corporation
- The Sheffield and Hallamshire Hack Saw Co
- The Sheffield Twist Drill and Steel Co
- The Shetack Tool Works
- The Small Power Dynamo and Motor Co
- The Smethwich Stamping Co
- The Solenoid Regulator Co
- The Southwark Manufacturing Co
- The Spartan Aircraft Co
- The Speedwell Gear Case Co
- The Spencer Wire Co
- The Sperry Gyroscope Co
- The Spiral Tube and Components Co
- The Spiro Ball Bearing Co
- The Square Grip Reinforcement Co
- The St Albans Rubber Co
- The St. Louis Aircraft Corporation
- The Stampings Alliance
- The Standard Insulator Co
- The Standard Wire Co
- The Star Aircraft Co
- The Stearman Aircraft Co
- The Stearn Electric Co
- The Steel Conduit Co
- The Steel Nut and Joseph Hampton
- The Steel Tube and Conduit Co (Middlesbrough)
- The Sterling Varnish Co
- The Stinson Aircraft Corporation
- The Stourbridge Rolling Mills
- The Stout Engineering Laboratories
- The Strand Electric and Engineering Co
- The Streetly Manufacturing Co
- The Sunderland Engineering Equipment Co
- The Supermarine Aviation Works (Vickers)
- The Sure-Arc Electrode Co
- The Sure-Arc Electrode Co
- The Swiss Locomotive and Machine Works
- The Taylor Aircraft Co
- The Tees Side Bridge and Engineering Works
- The Telegraph Construction and Maintenace Co
- The Tempered Spring Co
- The Temple Varnish Co
- The Temple Varnish Company
- The Texas Oil Co
- The Thermolux Glass Co
- The Thornton-Pickard Manufacturing Co
- The Tilley Lamp Co
- The Timber Fireproofing Co
- The Transatlantic Oil Co
- The Triplex Safety Glass Co and Triplex (Northan)
- The Tudor Accumulator Co
- The Tudor Safety Glass Co
- The Union Cable Co
- The Union Steel and Manufacturing Co
- The United Aircraft Corporation
- The United Steel Companies
- The Universal Ball Bearing, Repair and Manufacturing Co
- The Valor Co
- The Victaulic Co
- The Victoria Electric Plant Co
- The Vigzol Oil Refining Co (London)
- The Viking Flying Boat Co
- The Villiers Engineering Co
- The Vincent Switchgear Manufacturing Co
- The W. Blackwell Oil Co
- The Waco Aircraft Co
- The Walsall Electrical Co
- The Walter Kidde Co
- The Warner Aircraft Corporation
- The Warrington Light Casting Co
- The Wayne V. Myers Co
- The Weldless Steel Tube Co
- The Wellman Bibby Co
- The Wellman Smith Owen Engineering Corporation
- The Wessex Aircraft Engineering Co
- The West Bromwich Spring Co
- The Westgate Motor House Co (Gloucester)
- The Westminster Engineering Co
- The Whessoe Foundry and Engineering Co
- The Wiley Pist Aircraft Corporation
- The Y. S. C.
- The Yorkshire Copper Works
- The Yorkshire Hennebique Contracting Co
- The Young Accumulator Co
- The Young Accumulator Company (1929)
- The Zenith Carburetter Co
- The A. E. F. Manufacturing Co
- Theo Phillips, Son and Co
- Theodore Phillips, Son and Co
- [[* Thermofelt
- Thermolux Glass Co
- Thews
- Thomas Andrews and Co
- Thomas Bolton and Sons
- Thomas Bradley
- Thomas Bugden and Co
- Thomas Chatwin and Co
- Thomas De la Rue and Co
- Thomas Ellin (Footprint Works)
- Thomas Firth and John Brown
- Thomas Fry
- Thomas Green and Sons
- Thomas Hart
- Thomas Hinshelwood and Co
- Thomas Howse
- Thomas Moscrop and Co
- Thomas P. Hawkins and Son
- Thomas P. Headland
- Thomas Parsons and Sons
- Thomas R. Ellin (Footprint Works)
- Thomas Sampson
- Thomas Smiths Stamping Works
- Thomas Try
- Thomas Wareing and Co
- Thomas Williams and Sons
- Thompson Brothers (Aluminium)
- Thompson Brothers (Bilston)
- Thompson Brothers (Birkenhead)
- Thorium
- Thorn and Hoddle
- Thornes (Worcester)
- Thornton and Co
- Thornton-Pickard Manufacturing Co
- Three Star Accumulators
- Tilghmans Patent Sand Blast Co
- Tilley Lamp Co
- Timber Fireproofing Co
- Timm Aircraft Corporation
- Tipsy Light Aircraft
- Titanine
- Tittley, Son and Brickley
- Tokyo Air Transport Co
- Tokyo Gasu Denki K. K. (The Tokyo Gas and Electrical Co)
- Tokyo Gasu Denki Kabushiki Kaisha (Tokyo Gas and Electrical Co)
- Tokyo Koku Kaisha (Tokyi Aviation Co)
- Tormo
- Tractors (London)
- Transatlantic Oil Co
- Transcontinental and Western Air
- Transportes Aereas Centro Americanos (T. A. C. A.)
- Transportes Aereos Centroamericanos (T. A. C. A.)
- Transportes Aereos del Pacifico, S. A.
- Transreceivers
- Trent Oil Products
- Trevor Construction Co
- Triplex (Northern)
- Triplex Safety Glass Co
- Trojan
- Trost Brothers
- Troughton and Young
- Trussed Concrete Steel Co
- Tuck and Co
- Tucker Armoured Plywood Co
- Tudor Accumulator Co
- Tudor Safety Glass Co
- Tugan Aircraft
- Tungsten Manufacturing Co
- Tungum Sales Co
- Turkish State Airways Exploitation Ad
- Turley and Williams (1925)
- Turner and Newall
- Turner Brothers Asbestos Co
- Turner Machine Tools
- Turner, Naylor and Co
- Turnerised Roofing Co (Great Britain)
- Turners Asbestos Cement Co
- Turners Asbestos Co
- Turners Motor Manufacturing Co
- Turn-Over Filter Co
- Turton Brothers and Matthews
- Twining Models
- Tyme
- Typerlite Co
- Union Airways of New Zealand
- Union Cable Co
- Union Corporative Aeronautique
- Union Steel and Manufacturing Co
- United Airlines
- United Electrical Co (Coolex)
- United Filters and Engineering
- United Filters and Engineering Co
- United Steel and Manufacturing Co
- United Steel Companies
- Universal Asbestos Manufacturing Co
- Universal Ball Bearing Rep and Manufacturing Co
- Universal Grinding Wheel Co
- Universal Oil Burners
- Universe Petroleum Co
- Uraba, Medellin and Central Airways
- Urwin and Co
- V. A. Ercolani
- V. Foster
- V. Greenhous
- V. L. Churchill and Co
- V. W. Derrington
- Vacuum Oil Co
- Valor Co
- Valtion Lentokonetehdas (The State Aircraft Factory)
- Valvis and Co
- Valvoline Oil Co
- Vandome and Hart
- Varney Air Transport
- Vectic Airports
- Venesta
- Venreco
- Viacao Aero Sao Paulo, S.A.
- Vickers (Aviation)
- Vickers-Armstrong
- Victaulic Co
- Victoria Drop Forgings Co
- Victoria Electric Plant Co
- Victorian and Interstate Airways
- Vigzol Oil Refining Co (London)
- Villiers Engineering Co
- Villiers Hay Development
- Vincent Switchgear Manufacturing Co
- Vinces Dry Batteries
- Viscount Clive
- Viscount Forbes
- Vojenska Tovarna Na Letadla
- Vosper
- Vulcan Manufacturing (Wolverhampton)
- Vulcanite
- Vultee Aircraft Division, Aviation Manufacturing Corporation
- W. A. Hole A.M.I.E.E.
- W. A. Parker and Co
- W. A. Williamson and Co
- W. Adams
- W. and A. Williamson and Co
- W. and J. George
- W. and J. Leigh
- W. and J. R. Watson
- W. and T. Avery
- W. and T. Jackson and Co
- W. Annison Bull
- W. B. Dick and Co
- W. B. Harrison
- W. Blackwell Oil Co
- W. Brown
- W. Bull Annison
- W. C. Martin and Co
- W. Canning and Co
- W. Cannings and Co
- W. Courtenay
- W. D. Macpherson
- W. Dorman and Co
- W. E. Davis
- W. Edwards and Co
- W. F. Dennis and Co
- W. F. Smallman and Son
- Snowdon, Sons and Co
- W. G. Robson
- W. Gallimore and Sons
- W. Goldsmith
- W. Greenhalgh
- W. H. Allen and Sons and Co
- W. H. Allen, Sons and Co
- W. H. Dorman and Co
- W. H. Hotton and Co
- W. H. Moss
- W. H. Reynolds
- W. H. Reynolds and Co
- W. H. Silvester
- W. Humble
- W. J. Cearns
- W. J. Furse and Co
- W. J. Gunther
- W. J. Smith-Jackson
- W. L. Hey
- W. L. Lewis
- W. L. Runciman
- W. L. S. Macleod
- W. Lindsay Everard, M. P.
- A .W. Martin and Co
- W. McGowing and Co
- W. N. Nicholson and Sons
- W. P. Butterfield
- W. P. O. Evans
- W. P. Taylor
- W. Pound and Co
- W. R. Carpenter
- W. R. D. Perkiss
- W. R. Ellis
- W. R. Norman
- W. R. Porter
- W. R. Thornton
- W. S. Shackleton
- W. T. Bowie and Co
- W. T. Flather
- W. T. Henleys Telegraph Works Co
- W. Taylor-Young
- W. V. Smedley and C. Bell
- W. W. Greener
- W. W. Howard Brothers and Co
- W.A.S.P Air Lines
- Wadkin
- Wakeham Brothers
- Walker and Holroyd (1933)
- Walker and Wilson
- Walker, Crosweller and Co
- Waller and Co
- Walraven
- Walsall Electrical Co
- Walter Kidde Co
- Walter Spencer and Co
- Walters Electrical Manufacturing Co
- Ward and Goldstone
- Ward, Haggas and Smith
- Warrington Light Castings Co
- Watanabe Iron Works Co
- Water Purifiers
- Waterman Arrowplane Corporation
- Watson Duncan Electrical Engineers
- Watson, Saville and Co
- Watts Brothers (Sheffield)
- Wayne Tank and Pump Co
- Wayne V. Myers Co
- Weathershields
- Webb and Wilson
- Webley and Scott
- Webster and Co
- Weddel-Williams Air Service Corp
- Wedderburn and Burn
- Wednesbury Tube Co
- Weir Precision Engineering
- Weldless Steel Tube Co
- Weldox
- Weldrics (1922)
- Wellings and McMillan
- Wellman Bibby Co
- Wellworthy Piston Rings
- Wessex Aircraft Engineering Co
- West Bromwich Spring Co
- West London Welding Co
- West of Scotland Air Services
- Western Air Express Corp
- Western Air Transport
- Western Aircraft
- Western Aircraft Sales
- Western Airways
- Westland Aircraft
- Westminster Engineering Co
- Weston Electrical Instrument Co
- Westwood Rim and Patents
- Westwood, Macneill and Co
- Weybridge Air Services
- Weybun Engineering Co
- Whessoe Foundry and Engineering Co
- Whipp and Bourne
- White Brothers and Jacobs
- Whites Engineering Co (Pendleton)
- Whitney Straight
- Wideroes Flyveselskap, A/S
- Wild Barfield Electric Furnaces
- Wilfred Overton
- Wilfred Robbins
- Wilfrid Overton
- Wilkins and Wright
- Wilkinson, Bentley and Co
- Willford and Co
- William Asquith
- William Bain and Co
- William Bayliss
- William Beardmore and Co
- William Coates and Son
- William Coulthard and Co
- William E. Cary
- William Gallimore and Sons
- William Harland and Son
- William Jessop and Sons
- William Mallinson and Sons
- William Marples and Sons
- William McPhail and Sons
- William Mills
- William Morrison and Sons (Leith)
- William Moyers and Sons
- William Newman and Sons
- William Ridgway and Sons
- William Spencer and Son
- William Standring
- William Stephens and Sons
- William Terrell and Sons
- William Turner and Brother
- William Twigg and Co
- William Ward and Son (Sheffield)
- Williams and Co
- Williams and Howard
- Williams and James
- Williams Brothers (Sheffield)
- Williams Brothers and Piggott
- Williams Brothers Sheffield
- Williamson Manufacturing Co
- Williamson Packing Co
- Wills Pressure Filled Joint Ring
- Wilmington-Catalina Airline
- Wilmot-Breeden
- Wilson Airways
- Wilson Brothers (Leeds)
- Wilson Fyfe and Co
- Wings
- Wolverhampton Die-Casting Co
- Wondergrip Products
- Woods, Sons and Co
- Worcester Windscreens and Casements
- Worldwin Pistons
- Worthington-Simpson
- Wright Aeronautical Corporation
- Wright and Weaire
- Wrights Ropes
- Wrightways
- Wryburn Engineering Co
- Wynn Timmins
- Wyoming Air Service
- Y. Goldberg and Sons
- Y. S. C.
- Yacco
- Yorkshire Airways
- Yorkshire Aviation Services Country Club
- Yorkshire Aviation Services Country Club (incorporating York and Leeming Flying Club)
- Yorkshire Copper Works
- Yorkshire Hennebique Contracting Co
- Young Accumulator Co (1929)
- Zenith Carburetter Co
- Zinc Alloy Rust Proofing Co
- Zwicky