Issued Patents 2019
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10511900 | Headphone | Koji Otsuka, Yumi Shimazaki | 2019-12-17 |
| 10249287 | Noise-cancelling headphone | Koji Otsuka, Yumi Shimazaki | 2019-04-02 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10511900 | Headphone | Koji Otsuka, Yumi Shimazaki | 2019-12-17 |
| 10249287 | Noise-cancelling headphone | Koji Otsuka, Yumi Shimazaki | 2019-04-02 |