Granted Patent
Utility
US 4,909,348 · App. 07/267,818
Stamp formed exhaust muffler with conformal outer shell
Inventors:
Jon W. Harwood, Walter G. Moring, III, Paul E. Larkins
Patented Case
View Patent ↗
Granted: Mar 20, 1990
Filed: Nov 7, 1988
Inventors
Jon W. Harwood
Walter G. Moring, III
Paul E. Larkins
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.