Granted Patent
Utility
US 5,597,986 · App. 08/395,049
Stamp formed muffler with nested chambers
Inventors:
Jon W. Harwood, Bennie A. Van Blaircum
Patented Case
View Patent ↗
Granted: Jan 28, 1997
Filed: Feb 27, 1995
Inventors
Jon W. Harwood
Bennie A. Van Blaircum
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.