Granted Patent
Utility
US 5,584,580 · App. 08/201,125
Tamper-resistant envelope closure
Inventor:
Kurt Vetter
Patented Case
View Patent ↗
Granted: Dec 17, 1996
Filed: Feb 24, 1994
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.