Granted Patent
Utility
US 6,771,639 · App. 09/546,092
Providing announcement information in requests to establish interactive call sessions
Inventor:
Mark Holden
Patented Case
View Patent ↗
Granted: Aug 3, 2004
Filed: Apr 10, 2000
Inventor
Mark Holden
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.