Granted Patent
Utility
US 5,956,404 · App. 08/724,622
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Inventors:
Bruce Schneier, John Michael Kelsey, Jr.
Patented Case
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Granted: Sep 21, 1999
Filed: Sep 30, 1996
Inventors
Bruce Schneier
John Michael Kelsey, Jr.
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.