Granted Patent
Utility
US 6,393,122 · App. 09/144,109
Method and device for providing intermediate telephone service with enhanced network reliability
Inventor:
Pierre-Luc Belzile
Patented Case
View Patent ↗
Granted: May 21, 2002
Filed: Aug 31, 1998
Inventor
Pierre-Luc Belzile
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.