Granted Patent
Utility
US 4,893,530 · App. 07/027,799
Plier-type tool
Inventor:
William A. Warheit
Patented Case
View Patent ↗
Granted: Jan 16, 1990
Filed: Mar 19, 1987
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.