Granted Patent
Utility
US 4,470,243 · App. 06/560,713
Combine drive control
Inventor:
James F. Rayfield
Patented Case
View Patent ↗
Granted: Sep 11, 1984
Filed: Dec 12, 1983
Inventor
James F. Rayfield
Assignee (at issue)
Sperry Corp.
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.