| 6359980 |
Method for administering advanced number portability numbers |
Cecil Bernard Cates, James Patrick Dunn, Ronald Martin, Jack R. Penrod, John Peterson +1 more |
2002-03-19 |
| 5694459 |
Personalized information service system |
Marjorie S. Backaus, Claire Darcelle Barrera, Esther L. Davenport, Harold Fahrer, Barry Norman Ostroff +1 more |
1997-12-02 |
| 5459779 |
Method for switching telephone calls to information service providers |
Marjorie S. Backaus, John J. Butz, Ali M. Cherchali, Esther L. Davenport, Harold Fahrer +1 more |
1995-10-17 |
| 5444713 |
Telephone information service system using digital and out-of-band signaling |
Marjorie S. Backaus, Claire Darcelle Barrera, Esther L. Davenport, Harold Fahrer, Barry Norman Ostroff +1 more |
1995-08-22 |
| 5185781 |
Automation of telephone operator assistance calls |
Douglas C. Dowden, Richard W. Hemmeter, Diane E. Herr, William K. McCormick, Richard J. Piereth +3 more |
1993-02-09 |
| 5181237 |
Automation of telephone operator assistance calls |
Douglas C. Dowden, Richard W. Hemmeter, Diane E. Herr, William K. McCormick, Richard J. Piereth +3 more |
1993-01-19 |
| 4899375 |
More efficient call handling for operator assistance calls |
Thomas Michael Bauer, Richard W. Hemmeter, Richard J. Piereth, Cyrenus M. Rubald |
1990-02-06 |