Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10212504 | Earphone device | Kazuhisa Kito, Naotaka Tsunoda | 2019-02-19 |
| 9451350 | Earphone device | Kazuhisa Kito, Naotaka Tsunoda | 2016-09-20 |
| D432519 | Loudspeaker with amplifier | Kazuhiko Yamaoka, Morio Mizuno, Yukitaka Naritomi, Mitsuaki Kanada | 2000-10-24 |