U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

...that after Walter Hunt patented the safety pin in 1849, he sold the rights to it for $400?

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Class 144/60 - Dipping

Subclass of Class 144 - Woodworking
Definition: Machine which forms the head upon the framed or coiled match-splints,
No. of patents: 0