Issued Patents 1997
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5701657 | Method of manufacturing a repulsion magnetic circuit type loudspeaker | — | 1997-12-30 |
| 5701357 | Loudspeaker structure with a diffuser | Shinta Matsuo | 1997-12-23 |
| 5682436 | Multipoint driving loudspeaker having repulsion magnetic-type driving unit | Toshitaka Kawamidori | 1997-10-28 |
| 5668886 | Loudspeaker structure | Shuhei Ohta | 1997-09-16 |
| 5594805 | Loudspeaker | Shiro Iwakura, Akio Tanase, Kaoru Yamazaki | 1997-01-14 |