Granted Patent
Utility
US 5,092,830 · App. 07/529,899
Method of manufacturing twist-tie material
Inventor:
James R. Helseth
Patented Case
View Patent ↗
Granted: Mar 3, 1992
Filed: May 29, 1990
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.