Granted Patent
Utility
US 4,753,139 · App. 06/913,741
Fluid-operated wrench
Inventor:
John K. Junkers
Patented Case
View Patent ↗
Granted: Jun 28, 1988
Filed: Sep 30, 1986
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.