Granted Patent
Utility
US 4,769,166 · App. 07/056,163
Expandable magnetic sealant
Inventor:
Bruce Harrison
Patented Case
View Patent ↗
Granted: Sep 6, 1988
Filed: Jun 1, 1987
Inventor
Bruce Harrison
Assignee (at issue)
United Technologies Automotive
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.