active, c. 1930 - current (2009), manufacturer of water purification equipment, United Kingdom The Permutit Company Limited 1912 - 1993
active 1944-1954, laboratory apparatus & instrument maker, London, England W and J George and Becker Limited 1910 - 1954
1913-1936, aeroplane propeller design and manufacture, Weybridge, England, British Lang Propeller Company Limited 1913 - 1936
1913-1960, electrical switchgear manufacturer, Openshaw, Manchester Ferguson Pailin Limited 1913 - 1960
1912-1979, manufacturer of commercial vehicles (buses etc), Walthamstow, London The Associated Equipment Company Limited 1912 - 1979
1913-1947, scientific instrument maker, Glasgow, Scotland & London, England Kelvin, Bottomley & Baird Limited 1913 - 1947