Granted Patent
Utility
US 4,776,077 · App. 07/010,049
Method of making a thrust bearing underspring
Inventor:
Alston L. Gu
Patented Case
View Patent ↗
Granted: Oct 11, 1988
Filed: Feb 2, 1987
Inventor
Alston L. Gu
Assignee (at issue)
AlliedSignal, Inc.
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.