Granted Patent
Utility
US 6,760,752 · App. 09/340,853
Secure transmission system
Inventors:
Gary Liu, David P. Cook
Patented Case
View Patent ↗
Granted: Jul 6, 2004
Filed: Jun 28, 1999
Inventors
Gary Liu
David P. Cook
Assignee (at issue)
ZIX 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.