Granted Patent
Utility
US 4,729,154 · App. 06/936,853
Method of making and operating a very high speed marginally lubricated ball thrust bearing
Inventor:
Robert B. Gilbert
Patented Case
View Patent ↗
Granted: Mar 8, 1988
Filed: Dec 2, 1986
Inventor
Robert B. Gilbert
Assignee (at issue)
Garrett Corporation
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.