Granted Patent
Utility
US 6,519,249 · App. 09/220,549
Scalable gatekeepers in an internet telephony system and a method of operation
Inventors:
Brian Bennefeld, Patrick Ma, Gregory Graham, Michael Flynn Thomas
Patented Case
View Patent ↗
Granted: Feb 11, 2003
Filed: Dec 23, 1998
Inventors
Brian Bennefeld
Patrick Ma
Gregory Graham
Michael Flynn Thomas
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.