Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5693917 | Planar diaphragm loudspeaker | Alejandro Bertagni, James Schuessler, Alfredo D. Ferrin | 1997-12-02 |
| 5615275 | Planar diaphragm loudspeaker with counteractive weights | — | 1997-03-25 |