Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5185781 | Automation of telephone operator assistance calls | Richard W. Hemmeter, Diane E. Herr, William K. McCormick, Robert Petrelli, Richard J. Piereth +3 more | 1993-02-09 |
| 5181237 | Automation of telephone operator assistance calls | Richard W. Hemmeter, Diane E. Herr, William K. McCormick, Robert Petrelli, Richard J. Piereth +3 more | 1993-01-19 |
| 5163083 | Automation of telephone operator assistance calls | Richard W. Hemmeter, Diane E. Herr, Richard J. Piereth, Samuel M. Salchenberger, Chander S. Sehgal +1 more | 1992-11-10 |
| 4656624 | Operator communication arrangements for operator assistance systems | Johnny Collins, Michael Hirsh Cooper, Raymond J. Gill, Meyer J. Zola | 1987-04-07 |
| 4197430 | Operator service position system | — | 1980-04-08 |