Marconiphone

In 1922, the Marconi Company formed the "Marconiphone" department, to design, manufacture and sell domestic receiving equipment.

[1] This equipment complied with Post Office specifications and tests, and was therefore awarded the BBC authorisation stamp; initially sets were made at the Chelmsford Works.

Domestic receivers bearing the Marconiphone trademark produced after 1929 had no connection with the Marconi Company.

Phones made by companies such as NEC were given and additional small rectangular metal plate with the Marconiphone logo.

Marconi acted as a service provider for Cellnet and Vodafone in the UK before selling the customer base to Mercury in 1991.