Granted Patent
Utility
US 4,262,556 · App. 05/965,555
Drive mechanism
Inventor:
Cullen P. Hart
Patented Case
View Patent ↗
Granted: Apr 21, 1981
Filed: Nov 24, 1978
Inventor
Cullen P. Hart
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.