Granted Patent
Utility
US 4,266,671 · App. 06/064,881
Carton hanger-opener
Inventor:
Harry I. Roccaforte
Patented Case
View Patent ↗
Granted: May 12, 1981
Filed: Aug 8, 1979
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.