active 1924/6-1967, electrical measuring & scientific instrument maker, London, England, British Cambridge Scientific Instrument Company Limited 1924 - 1967
1878-1969, mathematical & scientific instrument maker, Manchester & London, England J Halden and Company Limited 1878 - 1969
1845-c. 1955, lens manufacturer; scientific instrument maker, Paris, France Lerebours et Secretan 1845 - 1955
active 1900s-1960s, mining equipment, surveying & scientific instrument maker, Derby, England John Davis and Son (Derby) Limited
active 1775-1800 & 1870-1930s, clock-maker; watchmaker; scientific instrument maker, France Bréguet 1775
active 1851-1950, globe maker; mathematical & scientific instrument maker; optician, London, England, British Newton and Company Limited 1851
active 1790-?, optical instrument maker; scientific instrument maker, Manchester, England Ronchetti family
active 1900s-1970s (?), opticians & scientific instrument maker/retailer, Liverpool, England Chadburns Limited
active, pre 1897-1950, laboratory apparatus & instrument maker, London, England W and J George Limited
active 1855-1865, physicist; watchmaker; scientific instrument maker, French Bréguet, Louis Clement François 1804 - 1883
active 1895-1910s , optician, optical & scientific instrument maker, Manchester, England J. Casartelli & Son
active 1919-1924/6, electrical measuring & scientific instrument maker, London, England Cambridge and Paul Instrument Company Limited
active 1752-1814, mathematical, nautical & scientific instrument maker, Paris, France Baradelle family
active 1817-1841, optical instrument maker; mathematical instrument maker; scientific instrument maker; manufacturer of waterproof fabrics; manufacturer of chemicals, Italian Ronchetti, Charles Joshua 1790 - 1850
1880-1938, scientific instrument maker; balance maker, Denver, United States William Ainsworth and Sons 1880 - 1938
active 1832-1859 , optician and optical instrument maker, French Chevalier, Charles Louis 1804 - 1859
1897-current [2012], clock-maker; watchmaker; scientific instrument maker, London, England E Dent & Company Limited 1897
c. 1540-c. 1623, scientific instrument maker; engraver; mathematician, Dutch Zeelst, Adriaan 1540 - 1623
1530?-1614, active 1554-1590, clockmaker; scientific instrument maker, Italian Volpaia, Girolamo della 1530 - 1614
active, 1916-1994, engineers; scientific instrument maker, Bounds Green, London, England R W Munro Limited 1864
active 1884-1899, scientific apparatus & instrument maker, London, England Harvey and Peak 1884 - 1909
1867-1944,active 1890-1920s, inventor; scientific & medical instrument maker, Austrian Castagna, Ludwig 1867 - 1944
1798-1860s, philosophical and scientific instrument maker; mechanist, English, British Reid, William 1798 - 1869
active 1864-1870/5 & 1900-1915, electrical measuring and scientific instrument maker, French Ducretet, Eugene 1844 - 1915
ca. 1530-1591, scientific instrument maker; die-sinker, engraver, English born, British Cole, Humfrey 1530 - 1591
1869-1943, scientific instrument maker; cinematographer, English; British Paul, Robert William 1868 - 1943
active 1841-1851, optical instrument maker; scientific instrument maker, Manchester, England John Baptist & Joshua Ronchetti 1841 - 1851
active 1967-1974, electrical scientific instruments manufacturer, London, England, British Cambridge Scientific Instruments Limited 1967 - 1974
1864-1897, marine balance maker; clock-maker; watchmaker; scientific instrument maker, London, England E Dent and Company
active 1849-1900, scientific, mathematical & optical instrument maker, Scottish; British Lowden, George Unknown - 1912
active 1802-1850s, philosophical and scientific instrument maker, active London, England Becker, Christian Unknown - 1856
active 1871/5-1880s, electrical measuring and scientific instrument makers, French E Ducretet and Company
active 1691-1744, mathematical & scientific instrument maker, Rome & Modena, Italy Lusuerg, Dominicus
