Granted Patent
Utility
US 4,373,973 · App. 06/321,515
Method of manufacture of high performance gears
Inventors:
Raymond A. Cellitti, John A. Halgren
Patented Case
View Patent ↗
Granted: Feb 15, 1983
Filed: Nov 16, 1981
Inventors
Raymond A. Cellitti
John A. Halgren
Assignee (at issue)
International Harvester Company
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.