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

"Telephone, n. An invention of the devil which abrogates some of the advantages of making a disagreeable person keep his distance. "

Ambose Bierce

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Class 213/114 - Pinless knuckles

Subclass of Class 213 - Railway draft appliances
Definition: Where other means than a pin is employed to pivot the knuckle
No. of patents: 0