Granted Patent
Utility
US 6,389,780 · App. 09/636,471
Zipper bag form, fill and seal machine and method
Inventors:
Thomas L. Coomber, Alexander R. Provan, Toby R. Thomas
Patented Case
View Patent ↗
Granted: May 21, 2002
Filed: Aug 10, 2000
Inventors
Thomas L. Coomber
Alexander R. Provan
Toby R. Thomas
Assignee (at issue)
PACTIV LLC
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.