Granted Patent
Utility
US 4,893,847 · App. 07/214,944
Bearing seal for universal ball joint
Inventor:
Robert Hess
Patented Case
View Patent ↗
Granted: Jan 16, 1990
Filed: Jul 5, 1988
Inventor
Robert Hess
Assignee (at issue)
Stainless Steel Products, 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.