Issued Patents 2004
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6829361 | Headphones with integrated microphones | — | 2004-12-07 |
| 6791519 | Sound and vision system | Mark Thomas Johnson | 2004-09-14 |
| 6792119 | Audio system | — | 2004-09-14 |
| 6678380 | Audio system | — | 2004-01-13 |