1904-1973, supplier of wholesale chemicals & drugs, England, British British Drug Houses Limited 1904 - 1973
(1839)1919-1972, photographic retailer; pharmacist, London, England Wallace Heaton Limited 1919 - 1972
1919-1995, multimedia publisher, educational film makers, Chicago Society for Visual Education Inc. 1919 - 1995
active 1900-1960s, manufacturer of electrical measuring equipment, Hendon, England Everett, Edgcumbe and Company Limited 1905 - 1968
1917-1958, manufacturer of projectors and cine equipment, Leeds, United Kingdom Kalee Limited 1917 - 1958
1913-1947, scientific instrument maker, Glasgow, Scotland & London, England Kelvin, Bottomley & Baird Limited 1913 - 1947
1891-active 1940s, silversmith; medalmaker, England Alexander Clark Manufacturing Company Limited 1912
1907-1927, camera and photographic equipment manufacturer, Rochester, New York Folmer-Schwing Division of Eastman Kodak 1907 - 1945
active 1904-1948, optical instrument maker (spectroscopes etc.), London, England Adam Hilger Limited 1904 - 1945
1903-, manufacturer of scientific instruments, Acton, London; Watford, England S G Brown Limited 1903
active, c. 1930 - current (2009), manufacturer of water purification equipment, United Kingdom The Permutit Company Limited 1912 - 1993
active 1916-1972, telegraphic, telephonic and telecommunication equipment manufacturer, Glasgow, Scotland; Croydon, Surrey, England, British Creed and Company Limited 1912
active 1950s-1970s, 1919-2008, graphic designer; poster artist; artist, British Stevens, Harry 1919 - 2008
1903-1940s , camera manufacturer, retailer, Westminster, London, England Westminster Photographic Exchange Limited 1903
1910-1999, first woman to receive a breast implant in Britain (1967), English Shilling, Gertrude 1910 - 1999
1901-1987, electrical & electronic engineering equipment manufacturer, England, British Ferranti Limited 1901 - 1987
1911-1932, telephone exchange manufacturer, Liverpool, England Automatic Telephone Manufacturing Company 1911 - 1932
active 1908-2007, science teaching measuring instrument manufacturer, Manchester, England George Cussons Limited 1908 - 2007
1901-1951, optical, lens, camera and cinematographic equipment manufacturer, Birmingham Aldis Brothers 1901 - 1951
1906-current (2018), precision measuring equipment designer, manufacturer and supplier, Sheffield, South Yorkshire, England, British Moore and Wright (Sheffield) Limited 1906
1903-1955, manufacturer of fire extinguishing equipment, London & Feltham, England Minimax Limited 1903 - 1955
