Granted Patent
Utility
US 4,120,212 · App. 05/844,551
Forward-reverse interlock for a transmission
Inventor:
R. Dale Philipsen
Patented Case
View Patent ↗
Granted: Oct 17, 1978
Filed: Oct 25, 1977
Inventor
R. Dale Philipsen
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.