Issued Patents 2004
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6819032 | Spark plug having resistance against smoldering, long lifetime, and excellent ignitability | — | 2004-11-16 |
| 6724133 | Spark plug with nickel alloy electrode base material | Naomichi Miyashita, Wataru Matsutani, Masayuki Segawa, Hiroaki Kuki, Mamoru Musasa | 2004-04-20 |