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 its 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