Granted Patent
Utility
US 4,852,890 · App. 07/189,822
Rotary shaft bearing isolator seal
Inventor:
Richard Borowski
Patented Case
View Patent ↗
Granted: Aug 1, 1989
Filed: May 3, 1988
Inventor
Richard Borowski
Assignee (at issue)
Garlock, 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.