Granted Patent
Utility
US 6,522,647 · App. 09/375,759
Enhanced VoDSL service provision
Inventors:
Igor K Czajkowski, Leslie Derek Humphrey, Brian Unitt
Patented Case
View Patent ↗
Granted: Feb 18, 2003
Filed: Aug 18, 1999
Inventors
Igor K Czajkowski
Leslie Derek Humphrey
Brian Unitt
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.