Issued Patents 2021
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11138961 | Sound output device and non-transitory computer-readable storage medium | Yasuhiko Oba, Michiko TANOUE | 2021-10-05 |
| 10937403 | Signal supply device, keyboard device and non-transitory computer-readable storage medium | Kenichi Nishida, Yasuhiko Oba, Michiko TANOUE | 2021-03-02 |
| 10902830 | Signal supply device, keyboard device and non-transitory computer-readable storage medium | Kenichi Nishida, Yasuhiko Oba, Michiko TANOUE | 2021-01-26 |