Granted Patent
Utility
US 5,301,574 · App. 08/025,131
Hydraulic wrench
Inventors:
Brian Knopp, Harry J. Knopp, Paul B. Stork
Patented Case
View Patent ↗
Granted: Apr 12, 1994
Filed: Mar 2, 1993
Inventors
Brian Knopp
Harry J. Knopp
Paul B. Stork
Assignee (at issue)
Bolttech, Inc.
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.