Issued Patents All Time
Showing 1–3 of 3 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, Richard J. Piereth, Samuel M. Salchenberger +1 more | 1992-11-10 |