Issued Patents 2017
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9800976 | Electroacoustic transducer | Yoji Honda, Kenzo Tsuihiji, Kenji Arai | 2017-10-24 |
| 9794682 | Electroacoustic transducer and acoustic resistor | Yoji Honda, Kenzo Tsuihiji, Kenji Arai | 2017-10-17 |
| 9609422 | Headphone unit and ear muff unit | Yoji Honda, Kenzo Tsuihiji, Kenji Arai | 2017-03-28 |