Issued Patents 2004
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6738487 | Earphone | Hideki Seki, Naotaka Tsunoda, Takashi Ohta | 2004-05-18 |
| 6728388 | Headphone | Tomohiro Ito | 2004-04-27 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6738487 | Earphone | Hideki Seki, Naotaka Tsunoda, Takashi Ohta | 2004-05-18 |
| 6728388 | Headphone | Tomohiro Ito | 2004-04-27 |