Granted Patent
Utility
US 4,932,791 · App. 07/350,460
Envelope closure seal and method
Inventor:
Kurt Vetter
Patented Case
View Patent ↗
Granted: Jun 12, 1990
Filed: May 11, 1989
Inventor
Kurt Vetter
Assignee (at issue)
Uniflex Company, Ltd.
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.