Granted Patent
Utility
US 6,430,176 · App. 09/187,975
Multimedia channel management through PSTN signaling
Inventor:
Samuel H. Christie, IV
Patented Case
View Patent ↗
Granted: Aug 6, 2002
Filed: Nov 6, 1998
Inventor
Samuel H. Christie, IV
Assignee (at issue)
Nortel Networks 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.