Granted Patent
Utility
US 4,481,837 · App. 06/414,284
Multiple speed gear transmission
Inventor:
Wallace G. Stevens
Patented Case
View Patent ↗
Granted: Nov 13, 1984
Filed: Jul 12, 1982
Inventor
Wallace G. Stevens
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.