Granted Patent
Utility
US 4,736,817 · App. 07/059,605
Stamp formed muffler
Inventor:
Jon W. Harwood
Patented Case
View Patent ↗
Granted: Apr 12, 1988
Filed: Jun 8, 1987
Inventor
Jon W. Harwood
Assignee (at issue)
AP Industries, Inc.
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.