Granted Patent
Utility
US 4,346,809 · App. 06/259,134
Two-piece closure having a child-resistant mode and a non child-resistant mode
Inventor:
Maximillian Kusz
Patented Case
View Patent ↗
Granted: Aug 31, 1982
Filed: Apr 30, 1981
Inventor
Maximillian Kusz
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.