Issued Patents 2003
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6657166 | Silicon nitride sintered material and production process thereof | Kouji Funaki, Hiroki Watanabe, Masaya Ito | 2003-12-02 |
| 6621052 | Silicon nitride-tungsten carbide composite sintered material, process for preparing the same and glow plug | Hiroki Watanabe, Masaya Ito | 2003-09-16 |
| 6563089 | Silicon nitride—tungsten carbide composite sintered material, production process therefor, and glow plug comprising the same | Hiroki Watanabe, Masaya Ito | 2003-05-13 |
| 6559579 | Alumina-based sintered body insulator for spark plugs | Hirohito Ito, Kenji Nunome, Makoto Sugimoto, Kuniharu Tanaka, Yoshihiro Yamamoto +1 more | 2003-05-06 |