Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5117451 | Interface to and operation of a voice messaging system | David Ladd, Gregory E. Pounds, Tim J. Kusumi, Robert R. Shepard | 1992-05-26 |
| 4926462 | Interface to and operation of a voice messaging system | David Ladd, Gregory E. Pounds, Tim J. Kusumi, Robert R. Shepard | 1990-05-15 |