Granted Patent
Utility
US 5,690,882 · App. 08/486,094
Method for making a tamper indicating package
Inventor:
Frank L. Sprowl
Patented Case
View Patent ↗
Granted: Nov 25, 1997
Filed: Jun 7, 1995
Inventor
Frank L. Sprowl
Assignee (at issue)
Owens-Illinois Closure 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.