Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5185781 | Automation of telephone operator assistance calls | Douglas C. Dowden, Richard W. Hemmeter, Diane E. Herr, William K. McCormick, Robert Petrelli +3 more | 1993-02-09 |
| 5181237 | Automation of telephone operator assistance calls | Douglas C. Dowden, Richard W. Hemmeter, Diane E. Herr, William K. McCormick, Robert Petrelli +3 more | 1993-01-19 |
| 5163083 | Automation of telephone operator assistance calls | Douglas C. Dowden, Richard W. Hemmeter, Diane E. Herr, Samuel M. Salchenberger, Chander S. Sehgal +1 more | 1992-11-10 |
| 4899375 | More efficient call handling for operator assistance calls | Thomas Michael Bauer, Richard W. Hemmeter, Robert Petrelli, Cyrenus M. Rubald | 1990-02-06 |
| 4677609 | Semi-automated directory assistance systems | Robert L. Potter, John Rider Williams | 1987-06-30 |