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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:

http://www.uspto.gov/patft

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:

http://www.alternatiff.com

Another .tiff viewer:

http://www.tiffviewer.com


www.freepatentsonline.com  

Simple, fast, useful patent search site. Quicker than the patent office site. 


www.wikipatents.com

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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