Granted Patent
Utility
US 6,464,228 · App. 09/618,619
Method of using a retrofittable severe duty seal for a shaft
Inventor:
Michael R. Oldenburg
Patented Case
View Patent ↗
Granted: Oct 15, 2002
Filed: Jul 18, 2000
Inventor
Michael R. Oldenburg
Assignee (at issue)
Transcom, 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.