Granted Patent
Utility
US 4,288,128 · App. 06/095,196
Self-aligning thrust bearing
Inventor:
Alan W. Wells
Patented Case
View Patent ↗
Granted: Sep 8, 1981
Filed: Oct 1, 1979
Inventor
Alan W. Wells
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.