Montague Radio Inventions and Development Co. Ltd.
Regent Street, London W1 (1928)
Beethoven Works, 24 Great College Street, London NW1 (1930)

Brand: Beethoven

Beethoven Radio Ltd.
Great College Street, Camden Town, London NW1 (1934)
Chase Road, North Acton, London NW10 (1936)

Beethoven Electric Equipment Ltd.
Chase Road, North Acton, London NW10 (1938)
Chapel Lane, Sands, High Wycombe, Buckinghamshire (from Dec. 1948)
89 Reddish Lane, Gorton, Manchester 10 (1953)

Montague Radio Inventions started to market sets under the Beethoven name as early as 1928.

They also manufactured appliances such as the "stream-lined Glywell" electric iron (1938).

After WW2 they were predominantly known for television manufacture. In 1960, they were owned by Outram (Investments) Ltd. (a subsidiary of Loyds Retailers Ltd) - along with Raymond Electric. Spare parts had been produced from 1957 onwards for both Beethoven and Raymond brands by a third-party company.

Beethoven Electric is still listed in the Who Owns Whom (UK and Ireland) directory of 1972.