Granted Patent
Utility
US 4,578,857 · App. 06/721,066
Tamperproof package
Inventors:
Thomas W. Gray, Ralph H. Whitney
Patented Case
View Patent ↗
Granted: Apr 1, 1986
Filed: Apr 8, 1985
Inventors
Thomas W. Gray
Ralph H. Whitney
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.