Issued Patents 2021
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10886708 | Spark plug for internal combustion engine | Daisuke Tanaka, Akimitsu Sugiura, Ryota Wakasugi, Kaori Doi, Kanechiyo Terada +2 more | 2021-01-05 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10886708 | Spark plug for internal combustion engine | Daisuke Tanaka, Akimitsu Sugiura, Ryota Wakasugi, Kaori Doi, Kanechiyo Terada +2 more | 2021-01-05 |