Granted Patent
Utility
US 4,240,534 · App. 06/011,599
Geared steering means
Inventors:
Richard L. Hedgcock, Gerald E. Whitehurst
Patented Case
View Patent ↗
Granted: Dec 23, 1980
Filed: Jan 26, 1979
Inventors
Richard L. Hedgcock
Gerald E. Whitehurst
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.