Granted Patent
Utility
US 4,265,332 · App. 06/050,730
Heat extracting muffler system
Inventors:
Lance O. Presnall, Gary H. Thurner
Patented Case
View Patent ↗
Granted: May 5, 1981
Filed: Jun 21, 1979
Inventors
Lance O. Presnall
Gary H. Thurner
Assignee (at issue)
FMC CORPORATION
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.