Granted Patent
Utility
US 4,938,818 · App. 07/290,475
Method of forming a seal
Inventors:
Henry S. Dzedzej, Richard F. DeRosa, Carl B. Schartner
Patented Case
View Patent ↗
Granted: Jul 3, 1990
Filed: Dec 29, 1988
Inventors
Henry S. Dzedzej
Richard F. DeRosa
Carl B. Schartner
Assignee (at issue)
Teledyne Industries, 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.