Granted Patent
Utility
US 4,246,989 · App. 05/967,542
Parking brake and transmission interlock system
Inventor:
Ramon C. Kohler
Patented Case
View Patent ↗
Granted: Jan 27, 1981
Filed: Dec 7, 1978
Inventor
Ramon C. Kohler
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.