Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11654827 | Driving sound generation device and driving sound generation method | — | 2023-05-23 |
| 10685637 | Noise masking device, vehicle and noise masking method | Kazuhisa Kotegawa | 2020-06-16 |
| 10290295 | Sound masking device, vehicle, and sound masking method | Kazuhisa Kotegawa | 2019-05-14 |