Issued Patents 2004
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 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 |