Granted Patent
Utility
US 6,691,389 · App. 10/129,673
Closing device for tubular packages
Inventor:
Klaus Töpfer
Patented Case
View Patent ↗
Granted: Feb 17, 2004
Filed: May 7, 2002
Inventor
Klaus Töpfer
Assignee (at issue)
Poly-clip System GmbH & Co. KG
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.