Issued Patents All Time
Showing 1–9 of 9 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 |
| 4818362 | Oxygen concentration sensing apparatus | Masahiko Asakura, Tomohiko Kawanabe, Shin'ichi Kubota, Katsuhiko Kimura, Yasunari Seki +1 more | 1989-04-04 |
| 4804454 | Oxygen concentration sensing apparatus | Masahiko Asakura, Yasunari Seki, Takanori Shiina | 1989-02-14 |
| 4763265 | Air intake side secondary air supply system for an internal combustion engine with an improved duty ratio control operation | Tomohiko Kawanabe, Masahiko Asakura, Noritaka Kushida, Yasunari Seki, Takanori Shiina | 1988-08-09 |
| 4732127 | Air/fuel ratio control system for an internal combustion engine with a function for preventing the blackening phenomenon of oxygen concentration sensor | Tomohiko Kawanabe, Masahiko Asakura, Katsuhiko Kimura | 1988-03-22 |
| 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, Katsuhiko Kimura, Noritaka Kushida, Hiroshi Hasebe | 1988-01-26 |
| 4705012 | Air intake side secondary air supply system for an internal combustion engine with a duty ratio control operation | Tomohiko Kawanabe, Masahiko Asakura, Noritaka Kushida, Takanori Shiina | 1987-11-10 |
| 4690121 | Air intake side secondary air supply system for an internal combustion engine with a duty ratio control operation | Tomohiko Kawanabe, Masahiko Asakura, Takanori Shiina, Yukihiro Matsumoto | 1987-09-01 |
| 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, Katsuhiko Kimura, Noritaka Kushida, Hiroshi Hasebe | 1987-05-19 |