Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5333195 | Telephone network speech signal enhancement | Duane O. Bowker, John T. Ganley | 1994-07-26 |
| 5195132 | Telephone network speech signal enhancement | Duane O. Bowker, John T. Ganley | 1993-03-16 |
| 5097771 | Wall-mounted shelf unit | — | 1992-03-24 |