Issued Patents 2004
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6759795 | Spark plug | Kenichi Kumagai, Makoto Yamaguchi | 2004-07-06 |
| 6724133 | Spark plug with nickel alloy electrode base material | Naomichi Miyashita, Yoshihiro Matsubara, Wataru Matsutani, Masayuki Segawa, Mamoru Musasa | 2004-04-20 |