Granted Patent
Utility
US 4,662,252 · App. 06/777,358
Auto-grip pliers
Inventor:
William A. Warheit
Patented Case
View Patent ↗
Granted: May 5, 1987
Filed: Sep 18, 1985
Inventor
William A. Warheit
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.