Granted Patent
Utility
US 5,268,903 · App. 07/770,197
Multichannel telephonic switching network with different signaling formats and cross connect/PBX treatment selectable for each channel
Inventors:
Barry W. Jones, Gordon J. Purtell
Patented Case
View Patent ↗
Granted: Dec 7, 1993
Filed: Oct 2, 1991
Inventors
Barry W. Jones
Gordon J. Purtell
Assignee (at issue)
Rockwell International Corporation
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.