Granted Patent
Utility
US 4,867,735 · App. 07/103,998
Method and apparatus for continuous production of bags from thermoplastic film
Inventor:
Donald E. Wogelius
Patented Case
View Patent ↗
Granted: Sep 19, 1989
Filed: Oct 1, 1987
Inventor
Donald E. Wogelius
Assignee (at issue)
First Brands Corporation
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.