Granted Patent
Utility
US 5,147,190 · App. 07/717,571
Increased efficiency valve system for a fluid pumping assembly
Inventor:
Len Alan Hovarter
Patented Case
View Patent ↗
Granted: Sep 15, 1992
Filed: Jun 19, 1991
Inventor
Len Alan Hovarter
Assignee (at issue)
General Motors 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.