Issued Patents 2003
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6548949 | Wedge base bulb | — | 2003-04-15 |
| 6543573 | Speaker unit, speaker system, and speaker diaphragm manufacturing method | Takeshi Aoki, Satoshi Iwasaki, Hirotoshi Kakuta | 2003-04-08 |