Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7058804 | Data storing system, issuing apparatus, data providing apparatus and computer readable medium storing data storing program | Hideki Akashika, Shinichi Hirata, Nagaaki Ohyama | 2006-06-06 |
| 6617706 | Ignition system | Yoshihiro Matsubara, Kazumasa Yoshida, Makoto Yamaguchi, Kazuya Iwata, Shoichiro Ito +1 more | 2003-09-09 |
| 6244247 | Ignition device for internal combustion engines | Yoshihiro Matsubara, Kazumasa Yoshida, Tetsusi Suzuki | 2001-06-12 |
| 6225752 | Spark plug for internal combustion engine | Yoshihiro Matsubara, Kazumasa Yoshida, Makoto Yamaguchi | 2001-05-01 |
| 6208066 | Semi-creeping discharge type spark plug | Kazumasa Yoshida, Yoshihiro Matsubara, Makoto Yamaguchi | 2001-03-27 |
| 6091185 | Lateral electrode type spark plug with geometrical relationships with ground electrode | Yoshihiro Matsubara, Kazumasa Yoshida | 2000-07-18 |
| 5929556 | Spark plug with center electrode having variable diameter portion retracted from front end on insulator | Yoshihiro Matsubara, Kazumasa Yoshida | 1999-07-27 |
| 5130652 | AC magnetic flux leakage flaw detecting apparatus for detecting flaws in flat surfaces with rotating leakage detection element | Masanobu Kawakami | 1992-07-14 |