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

...that "patent leather" got its name because the process of applying the polished black finish to leather was once patented?

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Class 144/100 - Inclined bitstock

Subclass of Class 144 - Woodworking
Definition: Machine in which the bit-stock is adapted to work, in reaming
No. of patents: 0