Issued Patents 2004
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6744901 | Headphone | Tomohiro Ito, Tomomi Hamada | 2004-06-01 |
| 6738487 | Earphone | Koji Nageno, Hideki Seki, Takashi Ohta | 2004-05-18 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6744901 | Headphone | Tomohiro Ito, Tomomi Hamada | 2004-06-01 |
| 6738487 | Earphone | Koji Nageno, Hideki Seki, Takashi Ohta | 2004-05-18 |