Granted Patent
Utility
US 4,068,104 · App. 05/686,968
Interface for in band SCPC supervisory and signalling system
Inventors:
Andrew Werth, Harold N. Lieberman
Patented Case
View Patent ↗
Granted: Jan 10, 1978
Filed: May 14, 1976
Inventors
Andrew Werth
Harold N. Lieberman
Assignee (at issue)
Digital Communications Associates, 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.