Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10615577 | Method for manufacturing spark plug | Kota Nishimura | 2020-04-07 |
| 10439368 | Production method of spark plug | Kota Nishimura | 2019-10-08 |
| 9252568 | Spark plug having ground electrode welded to metal shell | — | 2016-02-02 |
| 9197037 | Spark plug | — | 2015-11-24 |
| 8922103 | Spark plug | Osamu Yoshimoto, Tomo Tanaka | 2014-12-30 |