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 139/199 - Bow

Subclass of Class 139 - Textiles: weaving
Definition: Shuttles in which an arch containing the thread outlet eye
No. of patents: 0