Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9948069 | Spark plug | Daisuke Sumoyama | 2018-04-17 |
| 6864622 | Spark plug | Wataru Matsutani, Satoko Ito, Osamu Yoshimoto | 2005-03-08 |
| 6724133 | Spark plug with nickel alloy electrode base material | Naomichi Miyashita, Yoshihiro Matsubara, Wataru Matsutani, Hiroaki Kuki, Mamoru Musasa | 2004-04-20 |
| 6710523 | Spark plug internal combustion engine | Wataru Matsutani | 2004-03-23 |
| 6664719 | Spark plug | Wataru Matsutani, Satoko Ito | 2003-12-16 |