Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7551746 | Drive unit for electro-acoustic converter with radially magnetized permanent magnetic bars | — | 2009-06-23 |
| 7515723 | Electro-acoustic converter with demountable diaphragm and voice coil assembly | — | 2009-04-07 |
| 7379554 | Drive unit for electro-acoustic converter with dual magnetic circuits sharing permanent magnet | — | 2008-05-27 |
| 6912292 | Concentric co-planar multiband electro-acoustic converter | — | 2005-06-28 |