Granted Patent
Utility
US 5,046,306 · App. 07/556,689
Secondary oil system
Inventor:
Ronald J. Borre, Jr.
Patented Case
View Patent ↗
Granted: Sep 10, 1991
Filed: Jul 23, 1990
Inventor
Ronald J. Borre, Jr.
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.