Granted Patent
Utility
US 4,077,494 · App. 05/750,962
Grease gun
Inventors:
Robin W. Spaude, Alvin L. Bowers
Patented Case
View Patent ↗
Granted: Mar 7, 1978
Filed: Dec 15, 1976
Inventors
Robin W. Spaude
Alvin L. Bowers
Assignee (at issue)
Parker-Hannifin Corporation
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.