Granted Patent
Utility
US 5,318,152 · App. 08/010,887
Lubricating system
Inventor:
Charles W. Ehlert
Patented Case
View Patent ↗
Granted: Jun 7, 1994
Filed: Jan 29, 1993
Inventor
Charles W. Ehlert
Assignee (at issue)
Lubrication Systems Company of Texas, LLC
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.