Granted Patent
Utility
US 3,938,400 · App. 05/511,384
Single lever forward-reverse control
Inventor:
Peter P. Konyha
Patented Case
View Patent ↗
Granted: Feb 17, 1976
Filed: Oct 2, 1974
Inventor
Peter P. Konyha
Assignee (at issue)
Allis-Chalmers Corporation
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.