Radio Gramophone Development Co
of Birmingham
of Romford.
1929 Midland Radio Service Ltd was incorporated
1931 Name changed to Radio Gramophone Development Co Ltd
1937 Maker of RGD wireless receivers
By 1949 was an associate company of Automatic Telephone and Electric Co
c1949 Manufactured public address sound equipment at Bridgnorth which was sold by Automatic Telephone and Electric Co
1952 Automatic Telephone and Electric Co acquired the shares from the associated company British Insulated Callender's Cables
1952 Renamed A. T. and E. (Bridgnorth) Ltd
1953 The company had a high reputation for its radio and TV products but the new parent company had no wish to enter the domestic appliances business so disposed of this business; the commercial equipment activity was transferred to the new subsidiary at Bridgnorth, A. T. and E. (Bridgnorth)[1]
1953 Manufacturer of TV sets [2]
By 1960 Radio Gramophone Development Company Ltd had registered office at Romford[3]
1970 The company had been wound up[4]