Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6533115 | Packaging box for spark plugs | Tomoaki Aoki, Hisaki Sanoi, Yoshihiko Kawahara | 2003-03-18 |
| 5829587 | Package box for a spark plug | Mitsutaka Yoshida | 1998-11-03 |
| 5760533 | Spark plug for an internal combustion engine | Minoru Ando, Mitsutaka Yoshida | 1998-06-02 |
| 4909071 | Spark plug pressure sensor | Kouzou Amano, Shuzo Matsumura | 1990-03-20 |
| 4881403 | Spark plug with pressure sensor | Junichi Kagawa, Kozo Amano | 1989-11-21 |