Issued Patents 2021
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10900459 | Ignition control system and ignition control device | Akimitsu Sugiura, Fumiaki Aoki | 2021-01-26 |
| 10886708 | Spark plug for internal combustion engine | Shintaro Itoh, Daisuke Tanaka, Akimitsu Sugiura, Kaori Doi, Kanechiyo Terada +2 more | 2021-01-05 |