Granted Patent
Utility
US 4,512,017 · App. 06/464,058
Digital dual channel communication terminal
Inventors:
Richard J. Nici, George W. Schramm, John B. Sharp
Patented Case
View Patent ↗
Granted: Apr 16, 1985
Filed: Feb 4, 1983
Inventors
Richard J. Nici
George W. Schramm
John B. Sharp
Assignee (at issue)
AT&T Information Systems 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.