Granted Patent
Utility
US 4,322,009 · App. 06/151,046
Tamper proof molded plastic closure
Inventor:
George V. Mumford
Patented Case
View Patent ↗
Granted: Mar 30, 1982
Filed: May 19, 1980
Inventor
George V. Mumford
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.