Issued Patents All Time
Showing 1–25 of 27 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| RE37250 | Apparatus for detecting malfunction in evaporated fuel purge system | — | 2001-07-03 |
| 5313925 | Apparatus for detecting malfunction in fuel evaporative prurge system | Takayuki Otsuka, Kouichi Osawa, Hironori Okamizu, Chikao Kunimasa | 1994-05-24 |
| 5282383 | Method and apparatus for determining deterioration of three-way catalysts in double air-fuel ratio sensors system | — | 1994-02-01 |
| 5245973 | Failure detection device for evaporative fuel purge system | Takayuki Otsuka | 1993-09-21 |
| 5245865 | Device for determining misfiring cylinder of multicylinder engine | — | 1993-09-21 |
| 5230319 | Apparatus for detecting malfunction in evaporated fuel purge system | Takayuki Otsuka, Kouichi Osawa, Hironori Okamizu, Chikao Kunimasa | 1993-07-27 |
| 5207057 | Air-fuel ratio control device for an engine | — | 1993-05-04 |
| 5203870 | Method and apparatus for detecting abnormal state of evaporative emission-control system | Kenichi Uchida, Takayuki Otsuka | 1993-04-20 |
| 5181499 | Apparatus for diagnosing abnormality in fuel injection system and fuel injection control system having the apparatus | — | 1993-01-26 |
| 5165230 | Apparatus for determining deterioration of three-way catalyst of internal combustion engine | Masayuki Sawano | 1992-11-24 |
| 5143035 | Apparatus for detecting malfunction in evaporated fuel purge system | — | 1992-09-01 |
| 5119631 | Apparatus and method for detecting abnormalities in a secondary air supplier | Yasushi Satoh | 1992-06-09 |
| RE33942 | Double air-fuel ratio sensor system in internal combustion engine | Toshiyasu Katsuno, Yasushi Sato, Toshio Tanahashi, Yoshiki Chujo, Toshinari Nagai +3 more | 1992-06-02 |
| 5088281 | Method and apparatus for determining deterioration of three-way catalysts in double air-fuel ratio sensor system | Takahide Izutani, Michio Furuhashi, Yukihiro Sonoda, Hiroyuki Sawamoto, Kouichi Hoshi +2 more | 1992-02-18 |
| 5069035 | Misfire detecting system in double air-fuel ratio sensor system | — | 1991-12-03 |
| 5056494 | System for treating vaporized fuel in an internal combustion engine | — | 1991-10-15 |
| 4964272 | Air-fuel ratio feedback control system including at least downstreamside air-fuel ratio sensor | — | 1990-10-23 |
| 4809501 | Double air-fuel ratio sensor system having improved exhaust emission characteristics | Toshinari Nagai | 1989-03-07 |
| 4796425 | Double air-fuel ratio sensor system carrying out learning control operation | Toshinari Nagai | 1989-01-10 |
| 4745741 | Double air-fuel ratio sensor system having improved response characteristics | Takatoshi Masui, Toshinari Nagai, Toshiyasu Katsuno, Yoshiki Chujo, Hironori Bessho +2 more | 1988-05-24 |
| 4739614 | Double air-fuel ratio sensor system in internal combustion engine | Toshiyasu Katsuno, Yasushi Sato, Toshio Tanahashi, Yoshiki Chujo, Toshinari Nagai +3 more | 1988-04-26 |
| 4729219 | Double air-fuel ratio sensor system having improved response characteristics | Toshinari Nagai, Takatoshi Masui, Yoshiki Chujo, Hironori Bessho, Yasushi Sato +2 more | 1988-03-08 |
| 4703619 | Double air-fuel ratio sensor system having improved response characteristics | Yoshiki Chujo, Hironori Bessho, Takatoshi Masui, Toshiyasu Katsuno, Toshio Tanahashi | 1987-11-03 |
| 4693076 | Double air-fuel ratio sensor system having improved response characteristics | Yoshiki Chujo, Hironori Bessho, Takatoshi Masui, Toshinari Nagai, Toshiyasu Katsuno +1 more | 1987-09-15 |
| 4667636 | Fuel injection type internal combustion engine | Kiyohiko Oishi, Kiyoshi Nakanishi, Taiyo Kawai, Norihisa Nakagawa, Hiroshi Nomura | 1987-05-26 |