Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5640846 | Dual-sensor type air-fuel ratio control system for internal combustion engine and catalytic converter diagnosis apparatus for the same | Hirofumi Ohuchi | 1997-06-24 |
| 5591905 | Deterioration detecting apparatus for catalytic converter | Hirofumi Ohuchi | 1997-01-07 |