Granted Patent
Utility
US 5,232,431 · App. 07/746,231
Twist-tie material and method of fabrication
Inventor:
James R. Helseth
Patented Case
View Patent ↗
Granted: Aug 3, 1993
Filed: Aug 14, 1991
Inventor
James R. Helseth
Assignee (at issue)
Twist-Ease, Inc.
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.