Granted Patent
Utility
US 4,658,963 · App. 06/724,008
Package with weakened portion for opening
Inventor:
Wilfried Jud
Patented Case
View Patent ↗
Granted: Apr 21, 1987
Filed: Apr 17, 1985
Inventor
Wilfried Jud
Assignee (at issue)
Folienwalzwerk Bruder Teich AG
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.