Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8784524 | Duct vent filter cover | — | 2014-07-22 |
| 8778042 | Flat duct vent filter cover | — | 2014-07-15 |
| 5668499 | Tube type power amplifier with distortion control | Jack C. Sondermeyer | 1997-09-16 |