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U.S. Patent Dating Charts

For patents on mechanical operation

Use this list to date when an item was patented, not made

Patent Number	Year		Patent Number	Year
1	1836		333,494	1886
110	1837		355,291	1887
546	1838		375,720	1888
1,106	1839		395,305	1889
1,465	1840		418,665	1890
1,923	1841		443,987	1891
2,413	1842		466,315	1892
2,901	1843		488,976	1893
3,395	1844		511,744	1894
3,873	1845		531,619	1895
4,348	1846		552,502	1896
4,914	1847		574,369	1897
5,409	1848		596,467	1898
5,993	1849		616,871	1899
6,981	1850		640,167	1900
7,865	1851		664,827	1901
8,622	1852		690,385	1902
9,512	1853		717,521	1903
10,358	1854		748,567	1904
12,117	1855		778,834	1905
14,009	1856		808,618	1906
16,324	1857		839,799	1907
19,010	1858		875,679	1908
22,477	1859		908,436	1909
26,642	1860		945,010	1910
31,005	1861		980,178	1911
34,045	1862		1,013,095	1912
37,266	1863		1,049,326	1913
41,047	1864		1,083,267	1914
45,685	1865		1,123,212	1915
51,784	1866		1,166,419	1916
60,658	1867		1,210,389	1917
72,959	1868		1,251,458	1918
85,503	1869		1,290,027	1919
98,460	1870		1,326,899	1920
110,617	1871		1,364,063	1921
122,304	1872		1,401,948	1922
134,504	1873		1,440,362	1923
146,120	1874		1,478,996	1924
158,350	1875		1,521,590	1925
171,641	1876		1,568,040	1926
185,813	1877		1,612,700	1927
198,733	1878		1,654,521	1928
211,078	1879		1,696,897	1929
223,211	1880		1,742,181	1930
236,137	1881		1,787,424	1931
251,685	1882		1,839,190	1932
269,820	1883		1,892,663	1933
291,016	1884		1,941,449	1934
310,163	1885		1,985,878	1935

The United States patent number for each year is the first patent issued that calendar year.  A patent date is only when something was patented, not when it was actually made, many items were manufactured for many years after it was patented.

U.S. Design Patent Dating Chart

These Patent's cover the design of an item, and are usually designated with a 'D' in the number

The number for each year is the first design patent issued that year

The number for each year is the first design patent issued that year