Issued Patents All Time
Showing 51–75 of 76 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6094975 | Heater control having capability of restoring normal heater power supply after detection of abnormality | Jun Hasegawa | 2000-08-01 |
| 6085518 | Air-fuel ratio feedback control for engines | Shujiro Morinaga, Hisashi Iida, Hidenobu Muto | 2000-07-11 |
| 6032659 | Abnormality diagnosing system for air/fuel ratio feedback control system | Hisashi Iida, Yasuo Sagisaka | 2000-03-07 |
| 6009866 | Oxygen concentration detecting apparatus | Yasuo Sagisaka | 2000-01-04 |
| 5974857 | Apparatus and method for controlling oxygen sensor heating | Hisashi Iida, Jun Hasegawa | 1999-11-02 |
| 5967129 | Air-fuel ratio control for internal combustion engine enabling feedback before sensor activation | Hisashi Iida | 1999-10-19 |
| 5964208 | Abnormality diagnosing system for air/fuel ratio feedback control system | Jun Hasegawa, Hisashi Iida, Wakichi Kondo, Yasuo Sagisaka, Masahiko Yamaguchi | 1999-10-12 |
| 5852228 | Apparatus and method for controlling oxygen sensor heating | Hisashi Iida, Jun Hasegawa | 1998-12-22 |
| 5845486 | Internal combustion engine exhaust gas purifier apparatus | Toshiki Matsumoto | 1998-12-08 |
| 5802861 | Exhaust gas detoxificaton for internal combustion engine | Jun Hasegawa, Yasuhiko Niimi, Hiroshi Kishita | 1998-09-08 |
| 5762055 | Air-to-fuel ratio control apparatus for an internal combustion engine | Hisashi Iida | 1998-06-09 |
| 5758632 | Diagnostic apparatus for air-fuel ratio sensor | Hisashi Iida, Yasuo Sagisaka | 1998-06-02 |
| 5727383 | Catalyst deterioration detecting apparatus and exhaust emission control device failure detecting apparatus | Hisashi Iida, Masaaki Nakayama | 1998-03-17 |
| 5719778 | Heater control apparatus for oxygen sensor | Toshihiro Suzumura, Shigenori Isomura, Tomomichi Mizoguchi, Jun Hasegawa | 1998-02-17 |
| 5709198 | Oxygen concentration detecting apparatus | Yasuo Sagisaka | 1998-01-20 |
| 5672817 | Self-diagnostic apparatus of air-fuel ratio control system of internal combustion engine | Yasuo Sagisaka, Masaaki Nakayama, Yasuo Mukai, Hisashi Iida | 1997-09-30 |
| 5662776 | Glass fiber non-woven fabric, a method of producing glass fiber non-woven fabric and a method of producing a laminate | Masayuki Ushida, Masaru Ogata, Akihiro Hachiya, Masayuki Noda | 1997-09-02 |
| 5622047 | Method and apparatus for detecting saturation gas amount absorbed by catalytic converter | Kenji Ikuta, Shigenori Isomura | 1997-04-22 |
| 5579637 | Air-fuel ratio control apparatus for engine | Jun Hasegawa | 1996-12-03 |
| 5570574 | Air-fuel ratio control system for internal combustion engine | Toshihiro Suzumura | 1996-11-05 |
| 5501204 | Assist air control apparatus for internal combustion engine | Hisashi Iida, Keiji Honjoh | 1996-03-26 |
| 5491975 | Air-fuel ratio control system for internal combustion engine | Kenji Ikuta, Shigenori Isomura | 1996-02-20 |
| 5487270 | Air-fuel ratio control system for internal combustion engine | Kenji Ikuta, Shigenori Isomura | 1996-01-30 |
| 5445136 | Air-fuel ratio control apparatus for internal combustion engines | Toshihiro Suzumura | 1995-08-29 |
| 5390491 | Ignition timing control system for internal combustion engine | Toshihiro Suzumura | 1995-02-21 |