Issued Patents 2017
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 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 |