Granted Patent
Utility
US 6,373,946 · App. 08/997,695
Communication security
Inventor:
Thomas Francis Johnston
Patented Case
View Patent ↗
Granted: Apr 16, 2002
Filed: Dec 23, 1997
Inventor
Thomas Francis Johnston
Assignee (at issue)
ICO Services Limited
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.