Issued Patents 2022
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11438696 | Active noise reduction device and active noise reduction method | Kazuhisa Kotegawa | 2022-09-06 |
| 11250989 | Internal combustion engine ignition device | Takashi Idogawa | 2022-02-15 |