Sir George Godfrey and Partners
Sir George Godfrey and Partners of Edgware Road, London (1937)
of Hanworth, Middlesex (1945)
1937 Maker of actuators for aircraft (see advert)
c.1939 Proposed to the Air Ministry that they should investigate means of pressurising aircraft cabins, using their established Marshall supercharger. The company were the only British company investigating pressurisation pre-war
1943 and 1945 Patents concerning use of Roots blowers with engines
WWII Godfreys supplied the Marshall-Godfrey superchargers for use in high-altitude aircraft, as cabin blowers and for snorkel blowing on submarines.
1950 Private company.
1961 Manufacturers of aircraft air conditioning and pressurising equipment, pneumatic control equipment, special ground equipment for cooling aircraft and guided missiles. Pressure testing equipment. 
1968 Acquired by James Howden and Co