Issued Patents 2021
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11203039 | Acoustic-electric transducer | Koichi IRII, Mika Yoshino, Kosumo Miyauchi | 2021-12-21 |
| 11076222 | Electro-acoustic transducer and electro-acoustic conversion device | Koichi IRII | 2021-07-27 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11203039 | Acoustic-electric transducer | Koichi IRII, Mika Yoshino, Kosumo Miyauchi | 2021-12-21 |
| 11076222 | Electro-acoustic transducer and electro-acoustic conversion device | Koichi IRII | 2021-07-27 |