Granted Patent
Utility
US 4,777,796 · App. 07/023,534
Heat recovery muffler system
Inventor:
J. Albert McEachern, Jr.
Patented Case
View Patent ↗
Granted: Oct 18, 1988
Filed: Mar 9, 1987
Inventor
J. Albert McEachern, Jr.
Assignee (at issue)
Teledyne 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.