U.S. Patent Dating Chart

U.S. Patent Dating Chart
PATENT DATES FOR MECHANICAL OPERATION
Use this list to date when an item was patented.
*Manufacturing date can be different!

Patent Number	Year	Patent Number	Year	Patent Number	Year
1	1836	333,494	1886	2,026,516	1936
110	1837	355,291	1887	2,026,516	1937
546	1838	375,720	1888	2,066,309	1938
1,106	1839	395,305	1889	2,104,004	1939
1,465	1840	418,665	1890	2,142,080	1940
1,923	1841	443,987	1891	2,185,170	1941
2,413	1842	466,315	1892	2,227,418	1942
2,901	1843	488,976	1893	2,268,540	1943
3,395	1844	511,744	1894	2,307,007	1944
3,873	1845	531,619	1895	2,338,081	1945
4,348	1846	552,502	1896	2,391,856	1946
4,914	1847	574,369	1897	2,413,675	1947
5,409	1848	596,467	1898	2,433,824	1948
5,993	1849	616,871	1899	2,457,797	1949
6,981	1850	640,167	1900	2,492,944	1950
7,865	1851	664,827	1901	2,536,016	1951
8,622	1852	690,385	1902	2,,580,379	1952
9,512	1853	717,521	1903	2,624,046	1953
10,358	1854	748,567	1904	2,664,562	1954
12,117	1855	778,834	1905	2,698,434	1955
14,009	1856	808,618	1906	2,728,913	1956
16,324	1857	839,799	1907	2,775,752	1957
19,010	1858	875,679	1908	2,818,973	1958
22,477	1859	908,436	1909	2,866,973	1959
26,642	1860	945,010	1910	2,919,443	1960
31,005	1861	980,178	1911	2,966,681	1961
34,045	1862	1,013,095	1912	3,015,103	1962
37,266	1863	1,049,326	1913	3,070,801	1963
41,047	1864	1,083,267	1914	3,116,487	1964
45,685	1865	1,123,212	1915	3,163,865	1965
51,784	1866	1,166,419	1916	3,226,729	1966
60,658	1867	1,210,389	1917	3,295,143	1967
72,959	1868	1,251,458	1918	3,360,800	1968
85,503	1869	1,290,027	1919	3,419,907	1969
98,460	1870	1,326,899	1920	3,487,470	1970
110,617	1871	1,364,063	1921	3,551,909	1971
122,304	1872	1,401,948	1922	3,631,539	1972
134,504	1873	1,440,362	1923	3,707,729	1973
146,120	1874	1,478,996	1924	3,781,914	1974
158,350	1875	1,521,590	1925	3,858,241	1975
171,641	1876	1,568,040	1926	3,930,271	1976
185,813	1877	1,612,700	1927	4,000,520	1977
198,733	1878	1,654,521	1928	4,065,812	1978
211,078	1879	1,696,897	1929	4,131,952	1979
223,211	1880	1,742,181	1930	4,180,867	1980
236,137	1881	1,787,424	1931	4,242,757	1981
251,685	1882	1,839,190	1932	4,308,622	1982
269,820	1883	1,892,663	1933	4,366,579	1983
291,016	1884	1,941,449	1934	4,423,523	1984
310,163	1885	1,985,878	1935	4,490,885	1985

The United States patent number for each year is the first patent issued that calendar year.
*Always remember, 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, are
usually designated with a D in the number.