Issued Patents 2004
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6791245 | Glow plug and spark plug, and manufacturing method therefor | Hiroaki Nasu, Chiaki Kumada, Katsunari Ninomiya | 2004-09-14 |
| 6768249 | Spark plug and producing method therefor | Hiroaki Nasu | 2004-07-27 |
| 6724133 | Spark plug with nickel alloy electrode base material | Naomichi Miyashita, Yoshihiro Matsubara, Masayuki Segawa, Hiroaki Kuki, Mamoru Musasa | 2004-04-20 |
| 6710523 | Spark plug internal combustion engine | Masayuki Segawa | 2004-03-23 |
| 6688932 | Method for manufacturing spark plug and caulking metallic mold | Hiroaki Nasu, Yoshito Uemura, Makoto Sugimoto, Hirohito Ito | 2004-02-10 |