Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4742312 | Power limiting audio amplifier temperature protection circuit | David W. Osburn, James R. Knolinski | 1988-05-03 |
| 4721919 | Class G bridge amplifier with unipolar supplies | David W. Osburn | 1988-01-26 |