active 1789-1825, optician nautical instrument and telescope maker, English; British Cary, William 1759 - 1825
active 1791-1816, globe seller, optician, nautical instrument & telescope maker, London, England John and William Cary 1791 - 1816
active 1848-1860, barometer, thermometer, mathematical & optical instrument makers, London, England L Casella and Company
active 1914-1925, optical instrument makers, Dublin, Ireland & St Albans, Herts., England Sir Howard Grubb and Sons Limited
active 1925-1940/50s, optical instrument maker (telescopes etc.), Newcastle-upon-Tyne, England Sir Howard Grubb, Parsons and Company
active 1940/50s-1988, optical instrument maker (telescopes etc.), Newcastle-upon-Tyne, England Sir Howard Grubb, Parsons & Company Limited
active 1802-1901, optician, mathematical instrument , globe & telescope maker, London, England Thomas Harris & Son
active 1928-current (2006) optical instrument maker (telescopes & microscope), Wetzlar, Germany Hensoldt A.G.
