IP Library › Granted Patent US 5,444,713
Granted Patent Utility
US 5,444,713 · App. 08/121,124

Telephone information service system using digital and out-of-band signaling

Inventors: Marjorie S. Backaus, Claire Darcelle Barrera, Esther L. Davenport, Harold Fahrer, Barry Norman Ostroff, Robert Petrelli, Susan Kay Sonke
Patented Case View Patent ↗
Granted: Aug 22, 1995 Filed: Sep 14, 1993
Inventors
Marjorie S. Backaus
Claire Darcelle Barrera
Esther L. Davenport
Harold Fahrer
Barry Norman Ostroff
Robert Petrelli
Susan Kay Sonke
Assignee (at issue)
AT&T CORP.

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Quick Facts
Patent No.
US 5,444,713
App. No.
08/121,124
Filed
1993-09-14
Granted
1995-08-22
Kind
A