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Manufacturer of radios, based in Welwyn Garden City.
1928 Frank Murphy (1889-1955) left the partnership with Rupert Casson: Engineering Publicity Services, with the intention of manufacturing radios.
1929 Company registered by Frank Murphy (1889-1955); staff of 6
By 1936 The company was one of the leaders in the field of radios, with 600 employees
1948 Private company.
1953 Manufacturer of TV sets 
1961 Manufacturers of radio and television receivers, testing equipment, radiograms, communications receivers and transmitters, radar equipment, aircraft equipment, nucleonic equipment, interference tracing and measuring equipment, electro-medical apparatus, diagnostic and therapy X-Ray equipment and thermionic tubes. 4,300 employees. 
1961 Electronics Division acquired new premises at Stanmore
1963 Rank sold its holding in British Relay Wireless and Television, which it had acquired with Murphy, to International Publishing Corporation.