Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10355458 | Production method of spark plug | — | 2019-07-16 |
| 10297983 | Method of manufacturing spark plug | — | 2019-05-21 |
| 9455553 | Spark plug | Jiro Kyuno | 2016-09-27 |
| 9166379 | Spark plug | — | 2015-10-20 |
| 8729785 | Spark plug | Jiro Kyuno | 2014-05-20 |
| 8624475 | Spark plug | Tomoaki Kato, Jiro Kyuno, Naomichi Miyashita | 2014-01-07 |