Granted Patent
Utility
US 4,934,544 · App. 07/314,393
Z-tab innerseal for a container and method of application
Inventors:
Hak-Rhim Han, Theresa A. McCarthy
Patented Case
View Patent ↗
Granted: Jun 19, 1990
Filed: Feb 27, 1989
Inventors
Hak-Rhim Han
Theresa A. McCarthy
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.