Granted Patent
Utility
US 6,556,565 · App. 09/247,915
Internet protocol (IP) telecommunication
Inventors:
David P. Ward, Cuthbert Cheung, John Marshall, Ian Astle
Patented Case
View Patent ↗
Granted: Apr 29, 2003
Filed: Feb 11, 1999
Inventors
David P. Ward
Cuthbert Cheung
John Marshall
Ian Astle
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.