Radio Instruments
of Purley Way, Croydon, Surrey. Telephone: Thornton Heath 3211. Cables: "Instradio, Croydon"
1922 Exhibited a crystal set at the 1922 Wireless Exhibition
1923 Fitted a radio in a Fiat
1925 "Radio Instruments, Ltd, of 12. Hyde-street, New-Oxford-street, London, , W.C.1 , informs us that it has just appointed new representatives in the Northern district."[1]
1936 The instrument manufacturing department of Radio Instruments Ltd, of Croydon, approved manufacturers to the Air Ministry and other Government departments, was acquired by Aeronautical and General Instruments[2] but not the part of the business concerned with wireless receiving sets and parts for home use.
1936 The company was wound up voluntarily; J. Joseph was chairman[3]
1947 Listed Exhibitor - British Industries Fair. Manufacturers of Radio Apparatus. (Olympia, Ground Floor, Stand No. C.1539) [4]