Issued Patents 2021
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11203039 | Acoustic-electric transducer | Mika Yoshino, Kosumo Miyauchi, Hiroshi Akino | 2021-12-21 |
| 11076222 | Electro-acoustic transducer and electro-acoustic conversion device | Hiroshi Akino | 2021-07-27 |
| 10893354 | Headset | Mika Ito, Kosumo Miyauchi, Yutaka Akino | 2021-01-12 |