Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5955826 | Spark plug with built-in pressure sensor | Takahiro Suzuki, Kouji Okazaki, Yoshiaki Matsubara | 1999-09-21 |
| 5734094 | Ion current detector device for use in an internal combustion engine | Yoshihiro Matsubara, Masahiro Ishikawa, Terumasa Tomita | 1998-03-31 |