Granted Patent
Utility
US 4,844,040 · App. 07/167,966
Engines
Inventors:
Sam R. Leighton, Gregory B. Bell
Patented Case
View Patent ↗
Granted: Jul 4, 1989
Filed: Mar 14, 1988
Inventors
Sam R. Leighton
Gregory B. Bell
Assignee (at issue)
Orbital Engine Company Proprietary Limited
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.