active 1890s-1920s, manufacturer of optical and scientific instruments, Glasgow, Scotland Gardner and Company 1890
1903-, manufacturer of scientific instruments, Acton, London; Watford, England S G Brown Limited 1903
active 1970s-1999, manufacturer of electrical measuring and scientific instruments, Malvern, England White Electrical instrument Company Unknown - 1999
active c 1945- 1965? manufacturer of scientific instruments, Chicago, United States Offner Electronics Incorporated
1799-1880s?, manufacturer of scientific instruments; optician, Glasgow , Scotland Gardner and Company