Issued Patents 2003
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6632381 | Production process for alumina based insulator | — | 2003-10-14 |
| 6590317 | Spark plug | Kenichi Nishikawa, Yoshihide Kouge | 2003-07-08 |
| 6590318 | Spark plug having a reduced lead glaze layer on the insulator thereof | Kenichi Nishikawa | 2003-07-08 |
| 6566793 | Spark plug | Toshitaka Honda | 2003-05-20 |
| 6559579 | Alumina-based sintered body insulator for spark plugs | Hirohito Ito, Kenji Nunome, Kuniharu Tanaka, Katsura Matsubara, Yoshihiro Yamamoto +1 more | 2003-05-06 |