The Marconi Wireless Telegraph Company Limited was a telecommunications and engineering company that was responsible for some of the most important advances in radio and television development. The company traded under this name until 1963 when it became Marconi Company Limited.

1896/7 - founded by Guglielmo Marconi as the Wireless Telegraph & Signal Company (aka Wireless Telegraph Trading Signal Company)

1899/1900 - incorporated as a limited company as Marconi Wireless Telegraph Company Limited

1946 - taken over by English Electric, although continued to trade under original name until 1963

1963 - name changed to The Marconi Company Limited

Ericsson is now the parent company: Telefonaktiebolaget LM Ericsson