Granted Patent
Utility
US 4,652,473 · App. 06/679,763
Tamper-resistant packaging tape
Inventor:
Hak-Rhim Han
Patented Case
View Patent ↗
Granted: Mar 24, 1987
Filed: Dec 10, 1984
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.