Articles: Patent Numbers & Dates |
The following list is provided as a guide to help identify items where knowledge of the Patent Number can be useful in narrowing the period of when the item was manufactured and/or made available for sale.
Below you will find a selected series of Patent Numbers and the corresponding Month and Year within which it was issued.
1,922........pre 1841 2,400........Dec 1841 4,910........Dec 1846 8,620........Dec 1851 12,160........Jan 1855 22,430........Dec 1858 31,230........Jan 1861 35,290........May 1862 37,650........Feb 1863 45,600........Dec 1864 49,260........Aug 1865 73,250........Jan 1868 134,400........Dec 1872 172,300........Jan 1876 |
241,100........May 1881 338,200........Mar 1886 418,250........Dec 1889 478,660........Jul 1892 533,280........Jan 1895 610,900........Sep 1898 639,560........Dec 1899 673,050........May 1901 797,700........Aug 1905 979,180........Dec 1910 1,152,100........Aug 1915 1,352,120........Sep 1920 1,707,440........Apr 1929 1,839,180........Dec 1931 |
2,066,300........Dec 1936 2,268,540........Jan 1942 2,413,670........Dec 1946 2,580,380........Jan 1952 2,775,760........Dec 1956 3,015,100........Dec 1961 3,295,150........Jan 1967 3,631,540........Jan 1972 3,873,830........Mar 1975 4,134,130........Jan 1979 4,471,450........Sep 1984 4,881,020........Nov 1989 5,218,270........Jun 1993 5,525,900........Jun 1996 |
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