Granted Patent
Utility
US 4,160,456 · App. 05/833,775
2-Speed rotor gear case
Inventors:
Robert W. Hawkins, Paul G. Togami, T. Gary Drayer
Patented Case
View Patent ↗
Granted: Jul 10, 1979
Filed: Sep 16, 1977
Inventors
Robert W. Hawkins
Paul G. Togami
T. Gary Drayer
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.