Granted Patent
Utility
US 4,313,555 · App. 06/159,454
Corner lock carton
Inventor:
William G. Sieffert
Patented Case
View Patent ↗
Granted: Feb 2, 1982
Filed: Jun 16, 1980
Inventor
William G. Sieffert
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.