Granted Patent
Utility
US 4,969,652 · App. 07/332,202
Cooled shaft seal
Inventor:
John Munson
Patented Case
View Patent ↗
Granted: Nov 13, 1990
Filed: Apr 3, 1989
Inventor
John Munson
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.