Granted Patent
Utility
US 5,394,439 · App. 07/791,057
Bisdn compatible modem codec for digital information communication system
Inventor:
Farhad Hemmati
Patented Case
View Patent ↗
Granted: Feb 28, 1995
Filed: Nov 12, 1991
Inventor
Farhad Hemmati
Assignee (at issue)
Comsat, 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.