Granted Patent
Utility
US 4,723,897 · App. 06/934,346
Rotary engine
Inventor:
Sherwood L. Fawcett
Patented Case
View Patent ↗
Granted: Feb 9, 1988
Filed: Nov 24, 1986
Inventor
Sherwood L. Fawcett
Assignee (at issue)
Battelle Development 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.