Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| H427 | Air/fuel ratio detector | Tetsusyo Yamada | 1988-02-02 |
| 4615787 | Air/fuel ratio detector | Tetsusyo Yamada | 1986-10-07 |
| 4594139 | Air/fuel ratio detector | Yoshiaki Asayama, Tetsusyo Yamada | 1986-06-10 |
| 4591421 | Air/fuel ratio detector | Tetsusyo Yamada | 1986-05-27 |
| 4578171 | Air/fuel ratio detector | Tetsusyo Yamada | 1986-03-25 |
| 4578172 | Air/fuel ratio detector | Tetsusyo Yamada | 1986-03-25 |