Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12249809 | Spark plug insulator and spark plug | Hiroki Shimada, Haruki Yoshida, Kengo Fujimura | 2025-03-11 |
| 12095233 | Spark plug | Noriyuki Tamura, Haruki Yoshida, Hiroki Shimada, Tomoya Kukino, Kengo Fujimura | 2024-09-17 |
| 12095234 | Spark plug | Takeshi Sakuma, Yuichi Yamada, Haruki Yoshida, Hiroki Shimada | 2024-09-17 |
| 12095235 | Spark plug | Shoma Tsumagari, Haruki Yoshida, Hiroki Shimada, Tomoya Kukino, Noriyuki Tamura | 2024-09-17 |