Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11749971 | Metallic shell for spark plug and spark plug using the same | Takahiro SANDA, Keita Sugihara, Noriyasu Hasegawa | 2023-09-05 |
| 10431962 | Spark plug | Taku Kato | 2019-10-01 |
| 10063036 | Spark plug | Satoshi Nagasawa, Akira Suzuki | 2018-08-28 |