Issued Patents All Time
Showing 1–3 of 3 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 |
| 10410790 | Ignition coil for internal combustion engine | Takashi Idogawa | 2019-09-10 |