Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 133,786 pages of information and 211,899 images on early companies, their products and the people who designed and built them.
of Borehamwood, Herts. Telephone: Elstree 1137
1947 Listed Exhibitor - British Industries Fair. Manufacturers of Electronic Laboratory Equipment including Oscilloscopes, Oscillators, Attenuators, Valve Voltmeters, Output Meters, Frequency Standards, etc. Industrial Equipment including Watch and Clock Timers, Magnetic Amplifiers, Power Supplies and Servo Control Mechanisms. (Olympia, Ground Floor, Stand No. D.1697) 
1952 Patent - Improvements in modulating or demodulating devices. 
1966 Patent - Improvements in or relating to distance testing apparatus.