Issued Patents 2018
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10050417 | Spark plug and manufacturing method thereof | Ryohei Akiyoshi, Tomoyuki Watanabe | 2018-08-14 |
| 9935429 | Ignition control system | Ryohei Akiyoshi, Tomoyuki Watanabe | 2018-04-03 |
| 9929542 | Spark plug and method for manufacturing the same | Kenichi Araya, Koji Yamanaka | 2018-03-27 |