Granted Patent
Utility
US 4,523,488 · App. 06/439,363
Single lever control device for multiple functions
Inventor:
Donald A. Ahrendt
Patented Case
View Patent ↗
Granted: Jun 18, 1985
Filed: Nov 5, 1982
Inventor
Donald A. Ahrendt
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.