Issued Patents 2004
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6760455 | Electrostatic loudspeaker with a distributed filter | Robert C. Williamson | 2004-07-06 |
| 6704426 | Loudspeaker system | — | 2004-03-09 |
| 6700217 | Apparatus for converting ocean wave motion to electricity | Vaughn W. North, Kenneth L. DeVries | 2004-03-02 |