Issued Patents 2004
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6757404 | Loud speaker, diaphragm and process for making the diaphragm | Hiroyuki Takewa, Mitsukazu Kuze, Shinya Tabata, Shinya Mizone, Yoshiyuki Takahashi +5 more | 2004-06-29 |
| 6747395 | Piezoelectric loudspeaker | Kazue Satoh, Hiroyuki Takewa, Mitsukazu Kuze | 2004-06-08 |
| 6714655 | Speaker | Hiroyuki Takewa | 2004-03-30 |