Granted Patent
Utility
US 4,324,535 · App. 06/149,351
Slant axis rotary piston mechanism with fixed sinuous partition in grooved rotor
Inventor:
John M. Clarke
Patented Case
View Patent ↗
Granted: Apr 13, 1982
Filed: Jan 24, 1980
Inventor
John M. Clarke
Assignee (at issue)
Caterpillar Tractor Co.
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.