Granted Patent
Utility
US 4,781,153 · App. 07/080,538
Internal combustion engine
Inventor:
Bernard Hooper
Patented Case
View Patent ↗
Granted: Nov 1, 1988
Filed: Jun 9, 1987
Inventor
Bernard Hooper
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.