Granted Patent
Utility
US 6,320,939 · App. 09/142,528
Remote telephony testing device
Inventors:
Gregory M. Nulty, Larry Mortimer
Patented Case
View Patent ↗
Granted: Nov 20, 2001
Filed: Sep 9, 1998
Inventors
Gregory M. Nulty
Larry Mortimer
Assignee (at issue)
Tollgrade Communications, 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.