Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12258890 | Catalyst deterioration diagnosis device | Yuta SHIMIZU | 2025-03-25 |
| 8288928 | Spark plug for internal combustion engine | Teruyuki Kondo, Kozo Amano, Kazuo Yamazaki, Yoshihiro Nakai, Masatada Numano | 2012-10-16 |
| 7825571 | Spark plug for internal combustion engine | Teruyuki Kondo, Kozo Amano, Kazuo Yamazaki, Yoshihiro Nakai, Masatada Numano | 2010-11-02 |
| 7804232 | Spark plug with high durability | Wataru Matsutani, Kenji Kobayashi | 2010-09-28 |
| 7741763 | Spark plug | Koji MIZOGUCHI | 2010-06-22 |
| 6759795 | Spark plug | Makoto Yamaguchi, Hiroaki Kuki | 2004-07-06 |
| 6603244 | Spark plug and method of producing spark plug | Yoshihisa Sugiyama, Tomoharu Suzuki | 2003-08-05 |
| 4911883 | Cold working stainless steel | Yoshinobu Honkura, Toru Matsuo, Kouji Murata | 1990-03-27 |