Granted Patent
Utility
US 4,384,915 · App. 06/235,091
Apparatus for heat-attaching articles in a production line
Inventor:
Yoshikazu Utsumi
Patented Case
View Patent ↗
Granted: May 24, 1983
Filed: Feb 17, 1981
Inventor
Yoshikazu Utsumi
Assignee (at issue)
Tetra Pak International Aktiebolag
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.