Granted Patent
Utility
US 6,400,708 · App. 09/161,276
D-channel voice communications
Inventors:
Dale L. Bartholomew, Robert D. Farris, Raymond Ian Millet, David D. Hunter
Patented Case
View Patent ↗
Granted: Jun 4, 2002
Filed: Sep 28, 1998
Inventors
Dale L. Bartholomew
Robert D. Farris
Raymond Ian Millet
David D. Hunter
Assignee (at issue)
Verizon Services Corp.
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.