Granted Patent
Utility
US 6,449,720 · App. 09/313,295
Public cryptographic control unit and system therefor
Inventors:
Steven Sprague, Gregory J. Kazmierczak
Patented Case
View Patent ↗
Granted: Sep 10, 2002
Filed: May 17, 1999
Inventors
Steven Sprague
Gregory J. Kazmierczak
Assignee (at issue)
WAVE Systems, 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.