Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9985418 | Spark plug | — | 2018-05-29 |
| 9783872 | Electrode material and spark plug | Osamu Yoshimoto, Takehito Kuno, Tomo Tanaka, Toshihiro Uehara | 2017-10-10 |
| 9627857 | Spark plug | Daisuke Sumoyama | 2017-04-18 |
| 9548593 | Spark plug | Daisuke Sumoyama, Osamu Yoshimoto | 2017-01-17 |
| 9343876 | Spark plug | Osamu Yoshimoto, Takehito Kuno, Tomoo Tanaka | 2016-05-17 |
| 9197036 | Spark plug | Daisuke Sumoyama | 2015-11-24 |
| 8523625 | Method of manufacturing spark plug | Osamu Yoshimoto, Takaaki Kikai, Masahiro Inoue | 2013-09-03 |