Granted Patent
Utility
US 4,789,074 · App. 07/072,136
Cap liner
Inventor:
Hak-Rhim Han
Patented Case
View Patent ↗
Granted: Dec 6, 1988
Filed: Jul 10, 1987
Inventor
Hak-Rhim Han
Assignee (at issue)
Minnesota Mining and Manufacturing Company
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.