Issued Patents All Time
Showing 26–33 of 33 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5591905 | Deterioration detecting apparatus for catalytic converter | Hirofumi Ohuchi | 1997-01-07 |
| 5438827 | Dual-sensor type air-fuel ratio control system for internal combustion engine and catalytic diagnosis apparatus for the same | Hirofumi Ohuchi | 1995-08-08 |
| 5426937 | Dual-sensor type air-fuel ratio control system for internal combustion engine and catalytic converter diagnosis apparatus for the same | Hirofumi Ohuchi | 1995-06-27 |
| 5425234 | Dual-sensor type air-fuel ratio control system for internal combustion engine and catalytic converter diagnosis apparatus for the same | Hirofumi Ohuchi | 1995-06-20 |
| 5363647 | Dual-sensor type air fuel ratio control system for internal combustion engine and catalytic converter diagnosis apparatus for the same | Hirofumi Ohuchi | 1994-11-15 |
| 5341300 | Trouble diagnosis device and method for exhaust gas return control device | — | 1994-08-23 |
| 5327873 | Malfunction sensing apparatus for a fuel vapor control system | Hirofumi Ohuchi | 1994-07-12 |
| 5184594 | Failure diagnosis device of an EGR control device | Mamoru Saitoh | 1993-02-09 |