Granted Patent
Utility
US 4,577,874 · App. 06/755,639
Seal assembly
Inventor:
Gordon T. Zitting
Patented Case
View Patent ↗
Granted: Mar 25, 1986
Filed: Jul 16, 1985
Inventor
Gordon T. Zitting
Assignee (at issue)
Microdot 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.