Issued Patents 2018
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10128638 | Ignition plug | Ryoki Yagi | 2018-11-13 |
| 9917425 | Spark plug | Takafumi Umemura, Kouji Kamikawa | 2018-03-13 |
| 9876332 | Spark plug capable of restraining lateral sparking | — | 2018-01-23 |