1926-late 1960s, photographic advertising agency, England Photographic Advertising Limited 1926 - 1969
1915-2001, electronic test equipment manufacturer, Massachusetts, US General Radio Company 1915 - 2001
1932-1997, aerospace and weapons manufacturer, United States, American Hughes Aircraft Company 1932 - 1997
1896-1959, electrical equipment manufacturer, British British Thomson-Houston Company Limited 1896 - 1959
1900-1998, electrical/electronic measurement instrument manufacturer, England Marconi Instruments Limited 1900 - 1998
1937-current (2022), multinational specialising in imaging and optical products, Japan Canon Camera Co. Inc. 1937
active 1906-current (2009) preparer of Unani medicines, Asia (India, Pakistan) Hamdard (Waqf) Laboratories 1906
1931-current (2022), manufacturer of electronic equipment, London, England Multitone Electronic Company Limited 1931
active about 1919-1920s, maker of electrotherapeutic equipment, Paris, France Établissements Gaiffe-Gallot et Pilon 1919
active 1937-current (2011), manufacturer of pharmaceuticals, English subsiduary of American company Abbott Laboratories Limited 1937
1925-current (2022), manufacturer of motion picture cameras and lenses, Switzerland Paillard-Bolex 1925