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Have an item with a patent # on it? Here is the starting patent number by year to help you track down the year of your item. Remember that many items are manufactured for several years so the date might only tell you the earliest an item could have been made.

Patent Dates:
Year Pat No Year Pat No Year Pat No
1859 22477 1892 466315 1927 1654521
1860 26642 1893 488976 1928 1696897
1861 31005 1894 511744 1930 1742181
1862 34045 1895 531619 1931 1787424
1863 37266 1896 552502 1932 1839190
1864 41047 1897 574369 1933 1892663
1865 45686 1898 596467 1934 1941449
1866 51784 1899 616871 1935 1985878
1867 60685 1900 640167 1936 2026516
1868 72959 1901 664827 1937 2066309
1869 85503 1902 690385 1938 2104004
1870 98460 1903 717521 1939 2142080
1871 110617 1904 748567 1940 2185170
1872 122304 1905 778834 1941 2227418
1873 134504 1906 808618 1942 2268540
1874 146120 1907 839799 1943 2307007
1875 158350 1908 875679 1944 2338081
1876 171641 1911 980178 1945 2366154
1877 185813 1912 1013095 1946 2391856
1878 198733 1913 1049326 1947 2413675
1879 211078 1914 1083267 1948 2433824
1880 223210 1915 1123212 1949 2457797
1881 240373 1916 1166419 1950 2492944
1882 254836 1917 1210389 1951 2536016
1883 269820 1918 1251458 1952 2580379
1884 291016 1919 1290027 1953 2624046
1885 310168 1920 1329352 1954 2664592
1886 353494 1921 1364063 1955 2698439
1887 355291 1922 1401948 1956 2728913
1888 375720 1923 1440362 1957 2775762
1889 395305 1924 1521590 1958 2818567
1890 418665 1925 1568040 1959 2866973
1891 443987 1926 1612790 1960 2919443

You can do an on line patent search here:

www.StevenJohnson.com

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