Granted Patent
Utility
US 4,476,977 · App. 06/370,557
Closure interlock for wrap around cartons and including separator tabs
Inventor:
Guelfo A. Manizza
Patented Case
View Patent ↗
Granted: Oct 16, 1984
Filed: Apr 21, 1982
Inventor
Guelfo A. Manizza
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.