Granted Patent
Utility
US 4,433,807 · App. 06/370,558
Carton closure interlock
Inventor:
Robert H. Ganz
Patented Case
View Patent ↗
Granted: Feb 28, 1984
Filed: Apr 21, 1982
Inventor
Robert H. Ganz
Assignee (at issue)
Federal Paper Board Co., 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.