Granted Patent
Utility
US 4,231,509 · App. 06/037,432
Package and blank therefor
Inventor:
John J. Austin
Patented Case
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Granted: Nov 4, 1980
Filed: May 9, 1979
Inventor
John J. Austin
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.