Granted Patent
Utility
US 4,901,816 · App. 07/300,417
Light weight hybrid exhaust muffler
Inventor:
David Garey
Patented Case
View Patent ↗
Granted: Feb 20, 1990
Filed: Jan 23, 1989
Inventor
David Garey
Assignee (at issue)
AP Parts Manufacturing Company
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.