Granted Patent
Utility
US 4,589,591 · App. 06/552,921
Joint on packing containers and a method and arrangement for the manufacture of the same
Inventors:
Uno Sjostrand, Sven Andersson
Patented Case
View Patent ↗
Granted: May 20, 1986
Filed: Nov 18, 1983
Inventors
Uno Sjostrand
Sven Andersson
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.