Granted Patent
Utility
US 4,331,289 · App. 06/262,885
Four-ply handled carton
Inventor:
Earl J. Killy
Patented Case
View Patent ↗
Granted: May 25, 1982
Filed: May 13, 1981
Inventor
Earl J. Killy
Assignee (at issue)
Manville Service Corporation
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.