Granted Patent
Utility
US 6,453,034 · App. 09/364,536
Method of and system for extending internet telephony over virtual private network direct access lines
Inventors:
Steven R. Donovan, Matthew Cannon
Patented Case
View Patent ↗
Granted: Sep 17, 2002
Filed: Jul 29, 1999
Inventors
Steven R. Donovan
Matthew Cannon
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.