1900-1907, manufacturer of electrical measuring equipment, Glasgow, Scotland Kelvin and White 1900 - 1907
1878-1929, manufacturer of electrical equipment, Chelmsford, England Crompton and Company Limited 1878 - 1929
1883-1890, manufacturer of electrical equipment, London & Oldham, Manchester, England S Z de Ferranti 1883 - 1890
1881-1995, manufacturer of electrical equipment, United States Western Electric Company, Inc 1881 - 1995
active 1890-1901, manufacturer of electrical equipment, London & Manchester, England S Z de Ferranti Limited 1890 - 1901
1883-1885, manufacturer of electrical equipment, London, England Ferranti Hammond Electric Light Company 1883 - 1885
1896-1959, electrical equipment manufacturer, British British Thomson-Houston Company Limited 1896 - 1959
1882-1915, manufacturer of electrical equipment, Millwall, London Electric Power Storage Company Limited 1882 - 1915
1883-1996, manufacturer of electrical equipment, Germany Allgemeine Elektricitats-Gesellschaft 1883 - 1996
1926-1960, manufacturer of electrical & electronic radio and tv equipment, Southend-on-Sea, England E K Cole Limited 1926 - 1960
1945-1985, manufacturer of electronic equipment (acoustic devices), United Kingdom Dawe Instruments Limited 1945
1882-1883, manufacturer of electrical equipment, London, England Ferranti, Thompson and Ince Limited 1882 - 1883
active 1924-1940s, manufacturer of electrical equipment, Birmingham, England Telsen Electric Company Limited 1924
active until 1955, manufacturer of electrical equipment, Newark, United States Automatic Manufacturing Corporation Unknown - 1955
1991-current (2011), manufacturer of electrical equipment, Malmesbury, Wiltshire, England Dyson Appliances Limited 1991
1924-current (2022), manufacturer of electrical equipment, Berlin, Germany Beyerdynamic GmbH & Co KG 1924
1922- current (2012), manufacturer of electrical equipment, Birmingham, England Lodge-Cottrell Limited
active 1930-1937, manufacturer of electric motors and electrical equipment, London, England Normand Electrical Company