Granted Patent
Utility
US 4,343,563 · App. 06/245,240
Tapered spline and method of manufacturing same
Inventor:
James R. Bernhagen
Patented Case
View Patent ↗
Granted: Aug 10, 1982
Filed: May 16, 1980
Inventor
James R. Bernhagen
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.