Issued Patents All Time
Showing 1–16 of 16 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4870586 | Air-fuel ratio control system for an internal combustion engine with an engine load responsive correction operation | Masahiko Asakura, Takanori Shiina, Masahiro Ueda, Shinichi Kubota, Tomohiko Kawanabe +1 more | 1989-09-26 |
| 4842711 | Device for detecting air-fuel ratio of engine | Masahiko Asakura, Tomohiko Kawanabe | 1989-06-27 |
| 4843550 | Method of indicating a shift operation of a manual gearbox of a vehicle | Tomohiko Kawanabe, Masahiko Asakura, Shin'ichi Kubota, Yukihiro Matsumoto, Yasuhisa Arai +1 more | 1989-06-27 |
| 4808269 | Method for controlling an oxygen concentration sensing device | Tomohiko Kawanabe, Masahiko Asakura, Hiroshi Hasebe, Tessho Yamada | 1989-02-28 |
| 4767520 | Device for detecting air-fuel ratio of engine | Masahiko Asakura, Tomohiko Kawanabe | 1988-08-30 |
| 4762604 | Oxygen concentration sensing apparatus | Masahiko Asakura, Takanori Shiina, Shin'ichi Kubota | 1988-08-09 |
| 4763265 | Air intake side secondary air supply system for an internal combustion engine with an improved duty ratio control operation | Tomohiko Kawanabe, Masahiko Asakura, Yasunari Seki, Takanori Shiina, Minoru Muroya | 1988-08-09 |
| 4752883 | Method for directing an up-shift operation for a vehicle having a manual transmission | Masahiko Asakura, Katsuhisa Amano, Hiroshi Hasebe, Tomohiko Kawanabe, Masahiro Ueda +1 more | 1988-06-21 |
| 4721084 | Method for controlling an oxygen concentration sensor for sensing an oxygen concentration in an exhaust gas of an internal combustion engine | Tomohiko Kawanabe, Masahiko Asakura, Minoru Muroya, Katsuhiko Kimura, Hiroshi Hasebe | 1988-01-26 |
| 4715352 | Air intake side secondary air supply system for an internal combustion engine with a duty ratio control operation | Tomohiko Kawanabe, Masahiko Asakura, Katsuhiko Kimura | 1987-12-29 |
| 4715350 | Air intake side secondary air supply system for an internal combustion engine with a duty ratio control operation | Tomohiko Kawanabe, Masahiko Asakura, Yasunari Seki | 1987-12-29 |
| 4706637 | Oxygen concentration sensing device for an air-fuel ratio control system of an automotive internal combustion engine | Masahiko Asakura, Tomohiko Kawanabe, Hiroshi Hasebe | 1987-11-17 |
| 4705012 | Air intake side secondary air supply system for an internal combustion engine with a duty ratio control operation | Tomohiko Kawanabe, Masahiko Asakura, Takanori Shiina, Minoru Muroya | 1987-11-10 |
| 4694803 | Air-fuel ratio control system for an internal combustion engine with an atmospheric pressure responsive correction operation | Masahiko Asakura, Tomohiko Kawanabe, Masahiro Ueda, Shinichi Kubota, Yukihiro Matsumoto | 1987-09-22 |
| 4665874 | Device for sensing an oxygen concentration in gaseous body with a pump current supply circuit and an air/fuel ratio control system using an oxygen concentration sensing device | Tomohiko Kawanabe, Masahiko Asakura, Minoru Muroya, Katsuhiko Kimura, Hiroshi Hasebe | 1987-05-19 |
| 4665883 | Air fuel ratio control system for an internal combustion engine with improved operations for maintaining the engine output power | Katsuhisa Amano, Yasuhisa Arai, Masahiko Asakura | 1987-05-19 |