Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11434804 | Exhaust purification device | Tooru Hisanaga, Daisuke Sugaya, Hitoshi Shimonosono | 2022-09-06 |
| 10340666 | Spark plug | — | 2019-07-02 |
| 10283941 | Spark plug | — | 2019-05-07 |
| 10186844 | Spark plug | Tsutomu Kobayashi | 2019-01-22 |
| 9735552 | Spark plug | Tatsunori Yamada, Yusuke Fuji, Kei Takahashi | 2017-08-15 |
| 9083155 | Spark plug with an improved separation resistance of a noble metal tip | Hirotoshi Yoshizaki | 2015-07-14 |
| 8841828 | Spark plug | Ryuichi Ohno, Tatsunori Yamada, Katsutoshi Nakayama | 2014-09-23 |