
U.S. Patent Dating Chart
For patents on mechanical operation
Use this list to date when an item was patented.
| 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.
Design Patent Number |
Year |
Design Patent Number |
Year |
Design Patent Number |
Year |
||
| 1 | 1843 | 17,995 | 1888 | 88,847 | 1933 | ||
| 15 | 1844 | 18,830 | 1889 | 91,258 | 1934 | ||
| 27 | 1845 | 19,553 | 1890 | 94,179 | 1935 | ||
| 44 | 1846 | 20,439 | 1891 | 98,045 | 1936 | ||
| 103 | 1847 | 21,275 | 1892 | 102,601 | 1937 | ||
| 163 | 1848 | 22,092 | 1893 | 107,738 | 1938 | ||
| 209 | 1849 | 22,994 | 1894 | 112,765 | 1939 | ||
| 258 | 1850 | 23,922 | 1895 | 118,358 | 1940 | ||
| 341 | 1851 | 25,037 | 1896 | 124,503 | 1941 | ||
| 431 | 1852 | 26,482 | 1897 | 130,989 | 1942 | ||
| 540 | 1853 | 28,113 | 1898 | 134,717 | 1943 | ||
| 626 | 1854 | 29,916 | 1899 | 136,946 | 1944 | ||
| 683 | 1855 | 32,055 | 1900 | 139,862 | 1945 | ||
| 753 | 1856 | 33,813 | 1901 | 142,386 | 1946 | ||
| 860 | 1857 | 35,547 | 1902 | 145,165 | 1947 | ||
| 973 | 1858 | 36,187 | 1903 | 147,368 | 1948 | ||
| 1,075 | 1859 | 36,723 | 1904 | 151,235 | 1949 | ||
| 1,183 | 1860 | 37,280 | 1905 | 155,686 | 1950 | ||
| 1,366 | 1861 | 37,766 | 1906 | 160,404 | 1951 | ||
| 1,508 | 1862 | 38,391 | 1907 | 164,568 | 1952 | ||
| 1,703 | 1863 | 38,980 | 1908 | 168,527 | 1953 | ||
| 1,879 | 1864 | 39,737 | 1909 | 171,241 | 1954 | ||
| 2,018 | 1865 | 40,424 | 1910 | 173,777 | 1955 | ||
| 2.239 | 1866 | 41,063 | 1911 | 176,490 | 1956 | ||
| 2,533 | 1867 | 42,073 | 1912 | 179,467 | 1957 | ||
| 2,858 | 1868 | 43,415 | 1913 | 181,829 | 1958 | ||
| 3,304 | 1869 | 46,098 | 1914 | 184,204 | 1959 | ||
| 3,810 | 1870 | 46,813 | 1915 | 186,973 | 1960 | ||
| 4,547 | 1871 | 48,358 | 1916 | 189,516 | 1961 | ||
| 5,452 | 1872 | 50,117 | 1917 | 192,004 | 1962 | ||
| 6,336 | 1873 | 51,629 | 1918 | 194,304 | 1963 | ||
| 7,083 | 1874 | 52,836 | 1919 | 197,269 | 1964 | ||
| 7,969 | 1875 | 54,359 | 1920 | 199,995 | 1965 | ||
| 8,884 | 1876 | 56,844 | 1921 | 203,379 | 1966 | ||
| 9,686 | 1877 | 60,121 | 1922 | 206,567 | 1967 | ||
| 10,385 | 1878 | 61,748 | 1923 | 209,732 | 1968 | ||
| 10,975 | 1879 | 63,675 | 1924 | 213,084 | 1969 | ||
| 11,567 | 1880 | 66,346 | 1925 | 216,419 | 1970 | ||
| 12,082 | 1881 | 69,170 | 1926 | 219,637 | 1971 | ||
| 12,647 | 1882 | 71,722 | 1927 | 222,793 | 1972 | ||
| 13,508 | 1883 | 74,159 | 1928 | 225,695 | 1973 | ||
| 14,528 | 1884 | 77,347 | 1929 | 229,729 | 1974 | ||
| 15,678 | 1885 | 80,254 | 1930 | 234,032 | 1975 | ||
| 16,451 | 1886 | 82,966 | 1931 | 238,316 | 1976 | ||
| 17,046 | 1887 | 85,903 | 1932 | 242,881 | 1977 |
The number for each year is the first design patent issued that year. The first year for design patents was 1843. Design patents refer to any new ornamental design for an item. The design patent protects only the appearance of an article, but not its structural or functional features.
The U.S. Patent & Trademark office now has some of it's database online, with more coming.
United States Patent & Trademark Office
To search and view patents click on the link below:
To actually view the patent images you will need a plug in for your browser, Internet Explorer, Netscape, or Opera, called a Tiff viewer. The link below is to a free TIFF viewer you can download and install this is one of the ones recommended by the patent office. It is a small download:
Another .tiff viewer:
Simple, fast, useful patent search site. Quicker than the patent office site.
Allows PDF downloading of patents, free patent translation into multiple languages, and additional information and resources. Limited to patents after the mid 1970s.
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