Granted Patent
Utility
US 4,233,865 · App. 06/035,469
Hydraulic wrench
Inventor:
John K. Junkers
Patented Case
View Patent ↗
Granted: Nov 18, 1980
Filed: Apr 25, 1979
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.