Granted Patent
Utility
US 5,046,621 · App. 07/530,926
Tamper evident notched sealing envelope
Inventor:
Gary M. Bell
Patented Case
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Granted: Sep 10, 1991
Filed: May 30, 1990
Inventor
Gary M. Bell
Assignee (at issue)
Kapak 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.