Granted Patent
Utility
US 4,436,213 · App. 06/439,638
Container having tamper evident seal and imaged polymer film useful as such a seal
Inventors:
Fred R. Paul, Jr., James S. Mrozinski
Patented Case
View Patent ↗
Granted: Mar 13, 1984
Filed: Nov 5, 1982
Inventors
Fred R. Paul, Jr.
James S. Mrozinski
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.