Granted Patent
Utility
US 4,483,543 · App. 06/459,058
Seals
Inventors:
Ernest P. Fisher, Jr., William G. Boyle
Patented Case
View Patent ↗
Granted: Nov 20, 1984
Filed: Jan 19, 1983
Inventors
Ernest P. Fisher, Jr.
William G. Boyle
Assignee (at issue)
Otis Engineering Corporation
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.