Granted Patent
Utility
US 4,301,939 · App. 06/089,475
Reclosable packing container
Inventor:
Herwig Pupp
Patented Case
View Patent ↗
Granted: Nov 24, 1981
Filed: Oct 30, 1979
Inventor
Herwig Pupp
Assignee (at issue)
Tetra Pak International AB
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.