Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10784654 | Spark plug | — | 2020-09-22 |
| 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 |
| 9825435 | Method for producing spark plug | — | 2017-11-21 |
| 8860292 | Spark plug and method of manufacturing the same | — | 2014-10-14 |