Granted Patent
Utility
US 4,417,678 · App. 06/299,958
Carton opening device
Inventor:
Harry I. Roccaforte
Patented Case
View Patent ↗
Granted: Nov 29, 1983
Filed: Sep 8, 1981
Inventor
Harry I. Roccaforte
Assignee (at issue)
Champion International Corporation Limited
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.