Granted Patent
Utility
US 4,735,048 · App. 06/922,940
Hydraulic tool
Inventor:
Jack T. Gregory
Patented Case
View Patent ↗
Granted: Apr 5, 1988
Filed: Oct 24, 1986
Inventor
Jack T. Gregory
Assignee (at issue)
The Gregory Company
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.