Granted Patent
Utility
US 4,939,830 · App. 07/319,346
Method of making elastomeric embedded spring seal
Inventor:
Robert Janian
Patented Case
View Patent ↗
Granted: Jul 10, 1990
Filed: Mar 6, 1989
Inventor
Robert Janian
Assignee (at issue)
Tetrafluor, 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.