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image/svg+xml Arithmometer 1810 1820 1830 1840 1850 1860 1870 1880 1890 1851 1878 1883 1887 1889 1890 1892 1892 1893 1895 Burkhardt Layton Comptometer Comptograph Odhner's Arithmometer Burroughs Brunsviga 1 1 1 Saxonia 2 1. Arithmometer clone 2. Odhner clone Yellow marks the years in betweenpatent application and manufacturing Thomas & Payen The Millionaire