Granted Patent
Utility
US 6,751,198 · App. 09/472,149
System and method for measuring round trip delay of voice packets in a telephone system
Inventors:
Ian McPherson, Thornton L. Collins, Andre M. Cyr
Patented Case
View Patent ↗
Granted: Jun 15, 2004
Filed: Dec 27, 1999
Inventors
Ian McPherson
Thornton L. Collins
Andre M. Cyr
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.