Granted Patent
Utility
US 4,700,860 · App. 06/846,447
Tamper indicating vacuum package
Inventor:
Ernest Li
Patented Case
View Patent ↗
Granted: Oct 20, 1987
Filed: Mar 31, 1986
Inventor
Ernest Li
Assignee (at issue)
Owens-Illinois Inc.
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.