Granted Patent
Utility
US 6,389,005 · App. 08/980,760
Automatic backup trunking for voice over the internet
Inventor:
Brian Cruickshank
Patented Case
View Patent ↗
Granted: May 14, 2002
Filed: Dec 1, 1997
Inventor
Brian Cruickshank
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.