Granted Patent
Utility
US 4,759,697 · App. 07/051,204
Rotary piston machine having crown wheel coupled to the crank
Inventor:
Jean C. Janicki
Patented Case
View Patent ↗
Granted: Jul 26, 1988
Filed: May 18, 1987
Inventor
Jean C. Janicki
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.