Granted Patent
Utility
US 4,794,644 · App. 06/940,365
Method of secured communications in a telecommunications system
Inventors:
Alexander S. Philip, Mahir Ozdamar, Geoffrey Chopping
Patented Case
View Patent ↗
Granted: Dec 27, 1988
Filed: Dec 11, 1986
Inventors
Alexander S. Philip
Mahir Ozdamar
Geoffrey Chopping
Assignee (at issue)
The Plessey Company PLC
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.