Granted Patent
Utility
US 4,345,797 · App. 06/117,715
Lubrication system for an engine
Inventor:
Benny Ballheimer
Patented Case
View Patent ↗
Granted: Aug 24, 1982
Filed: Feb 1, 1980
Inventor
Benny Ballheimer
Assignee (at issue)
Caterpillar Tractor Co.
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.