Granted Patent
Utility
US 6,775,272 · App. 10/106,524
Virtual PBX system
Inventors:
Thomas J. Galvin, Michael Kirchner, Anthony W. S. Moey, Mark O'Brien, Joel Hanson
Patented Case
View Patent ↗
Granted: Aug 10, 2004
Filed: Mar 25, 2002
Inventors
Thomas J. Galvin
Michael Kirchner
Anthony W. S. Moey
Mark O'Brien
Joel Hanson
Assignee (at issue)
MCI, LLC
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.