Granted Patent
Utility
US 4,133,251 · App. 05/772,399
Single lever control apparatus
Inventors:
Richard W. Agge, Kenneth W. Kelly
Patented Case
View Patent ↗
Granted: Jan 9, 1979
Filed: Feb 28, 1977
Inventors
Richard W. Agge
Kenneth W. Kelly
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.