Granted Patent
Utility
US 5,812,639 · App. 08/557,749
Message communication via common signaling channel
Inventors:
Dale L. Bartholomew, Robert D. Farris
Patented Case
View Patent ↗
Granted: Sep 22, 1998
Filed: Nov 13, 1995
Inventors
Dale L. Bartholomew
Robert D. Farris
Assignee (at issue)
Bell Atlantic Network Services
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.