Granted Patent
Utility
US 4,541,497 · App. 06/619,168
Control mechanism for operating a tractor
Inventors:
Craig W. Riediger, Ervin E. Mangus, Gerald P. Simmons, Anthony J. Knock
Patented Case
View Patent ↗
Granted: Sep 17, 1985
Filed: Sep 13, 1982
Inventors
Craig W. Riediger
Ervin E. Mangus
Gerald P. Simmons
Anthony J. Knock
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.