Patent Numbers & Years
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Patent Numbers


Patent numbers can be very useful in determining the age of an item. Once you have the patent number, simply find where it falls on the chart below and you will have the year.

Example: Patent number 2069001. This number comes after the first patent number issued for 1937 but before the first number issued for 1938. Therefore, you can say this item was patented in 1937.




Patent Number
Date
1
1836
110
1837
546
1838
1061
1839
1465
1840
1923
1841
2413
1842
2901
1843
3395
1844
3873
1845
4348
1846
4914
1847
5409
1848
5993
1849
6961
1850
7865
1851
8622
1852
9512
1853
10358
1854
12117
1855
14009
1856
16324
1857
19010
1858
22477
1859
26642
1860
31005
1861
34045
1862
37266
1863
41047
1864
45685
1865
51784
1866
60658
1867
72959
1868
85503
1869
98460
1870
110617
1871
122304
1872
134504
1873
146120
1874
158350
1875
171641
1876
185813
1877
198753
1878
211078
1879
223211
1880
236137
1881
251685
1882
269320
1883
291016
1884
310163
1885
333494
1886
355291
1887
375720
1888
395305
1889
418655
1890
443987
1891
466315
1892
483976
1893
511744
1894
531619
1895
552502
1896
574369
1897
596467
1898
616871
1899
Patent Number
Date
640167
1900
664827
1901
690385
1902
717521
1903
758567
1904
778834
1905
808618
1906
839799
1907
875679
1908
908430
1909
945010
1910
980178
1911
1013095
1912
1049326
1913
1083267
1914
1125212
1915
1166419
1916
1210389
1917
1251458
1918
1290027
1919
1326899
1920
1354054
1921
1401948
1922
1440352
1923
1478996
1924
1521590
1925
1568040
1926
1612700
1927
1654521
1928
1696897
1929
1742181
1930
1787424
1931
1839190
1932
1892663
1933
1941449
1934
1985678
1935
2026516
1936
2066309
1937
2104004
1938
2142080
1939
2185170
1940
2227418
1941
2268540
1942
2307007
1943
2338061
1944
2366154
1945
2391856
1946
2413675
1947
2433824
1948
2457797
1949
2492944
1950
2536016
1951
2580379
1952
2624046
1953
2664562
1954
2698434
1955
Patent Number
Date
2728913
1956
2775762
1957
2818567
1958
2868973
1959
2919443
1960
2966681
1961
3015103
1962
3070801
1963
3116487
1964
3163365
1965
3226729
1966
3295143
1967
3360800
1968
3419907
1969
3487470
1970
3551909
1971
3633214
1972
3707729
1973
3781914
1974
3858241
1975
3930271
1976
4000520
1977
4065812
1978
4131952
1979
4180876
1980
4242757
1981
4308622
1982
4366579
1983
4423523
1984
4490885
1985
4562596
1986
4633526
1987
4716594
1988
4794652
1989
4890335
1990
4980927
1991
5077836
1992
5175886
1993
5274846
1994
5377359
1995
5479658
1996
5590420
1997
5704062
1998
5855021
1999
6009555
2000
6167569
2001
6334220
2002
6502244
2003
6671884
2004
6836899
2005
6981282
2006
7155746
2007
7313829
2008
7472428
2009
7640598
2010
7861371
2011
8087094
2012




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