Issued Patents 2005
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6934402 | Planar-magnetic speakers with secondary magnetic structure | David Graebener | 2005-08-23 |
| 6925187 | Horn array emitter | Elwood G. Norris | 2005-08-02 |
| 6850623 | Parametric loudspeaker with improved phase characteristics | Elwood G. Norris, Joseph O. Norris | 2005-02-01 |