Granted Patent
Utility
US 6,351,464 · App. 09/399,601
Virtual second line hybrid network communication system
Inventors:
Tom Galvin, Joel Hanson, Mike Kirchner, Tony Moey, Mark O'Brien
Patented Case
View Patent ↗
Granted: Feb 26, 2002
Filed: Sep 20, 1999
Inventors
Tom Galvin
Joel Hanson
Mike Kirchner
Tony Moey
Mark O'Brien
Assignee (at issue)
MCI WorldCom. Inc.
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.