Patent drawing

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Middlebrook paperclip machine patent, 1899

A patent drawing is a technical drawing of an patent invention, that shows the nature of the invention. The drawing must show every feature of the invention specified in the claims, and is required by the patent office rules to be in a particular form.

18th century patent drawings[edit]

19th century patent drawings[edit]

First half of 19th century[edit]

1850s[edit]

1860s[edit]

1870s[edit]

1880s[edit]

1890s[edit]

20th century patent drawings[edit]

1900s[edit]

1910s[edit]

1920s[edit]

1930s[edit]

1940s[edit]

1950s[edit]

1960s[edit]

1970s[edit]

1980s[edit]

1990s[edit]

21th century patent drawings[edit]

See also[edit]