Granted Patent
Utility
US 4,570,503 · App. 06/651,017
Countershaft transmission
Inventor:
Michael Theobald
Patented Case
View Patent ↗
Granted: Feb 18, 1986
Filed: Sep 17, 1984
Inventor
Michael Theobald
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.