Granted Patent
Utility
US 4,916,986 · App. 07/196,384
Fluid operated wrench
Inventor:
John K. Junkers
Patented Case
View Patent ↗
Granted: Apr 17, 1990
Filed: May 19, 1988
Inventor
John K. Junkers
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.