Issued Patents All Time
Showing 1–18 of 18 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6912159 | Boosting circuit and non-volatile semiconductor storage device containing the same | Seiji Yamahira | 2005-06-28 |
| 5313925 | Apparatus for detecting malfunction in fuel evaporative prurge system | Takayuki Otsuka, Nobuaki Kayanuma, Hironori Okamizu, Chikao Kunimasa | 1994-05-24 |
| 5309756 | Device for determining malfunction of an engine cylinder | Kenichi Harada | 1994-05-10 |
| 5295472 | Apparatus for detecting malfunction in evaporated fuel purge system used in internal combustion engine | Takayuki Otsuka, Tatsumasa Sugiyama, Katsuhiko Teraoka, Nobuyuki Kobayashi, Koji Okawa | 1994-03-22 |
| 5287737 | Device for determining misfiring of a cylinder of a multicylinder engine | Hideki Morishima | 1994-02-22 |
| 5243949 | Diagnostic device for exhaust gas recirculation device | — | 1993-09-14 |
| 5230319 | Apparatus for detecting malfunction in evaporated fuel purge system | Takayuki Otsuka, Nobuaki Kayanuma, Hironori Okamizu, Chikao Kunimasa | 1993-07-27 |
| 5088281 | Method and apparatus for determining deterioration of three-way catalysts in double air-fuel ratio sensor system | Takahide Izutani, Nobuaki Kayanuma, Michio Furuhashi, Yukihiro Sonoda, Hiroyuki Sawamoto +2 more | 1992-02-18 |
| 5088318 | Determining device for determining a failure in an engine cylinder | — | 1992-02-18 |
| 5027784 | PCV system with a check valve device | Yukihiro Sonoda | 1991-07-02 |
| 5018494 | Idling speed control device of an engine | Yukihiro Sonoda, Hiroshi Kanai, Kouichi Hoshi, Hiroki Matsuoka, Michihiro Ohashi +1 more | 1991-05-28 |
| 4991559 | Fuel injection control device of an engine | Hiroshi Kanai, Kouichi Hoshi, Hiroki Matsuoka, Michihiro Ohashi, Yukihiro Sonoda +7 more | 1991-02-12 |
| 4981122 | Fuel injection control device of an engine | Hiroshi Kanai, Kouichi Hoshi, Hiroki Matsuoka, Michihiro Ohashi, Yukihiro Sonoda +1 more | 1991-01-01 |
| 4976242 | Fuel injection control device of an engine | Yukihiro Sonoda, Hiroshi Kanai, Kouichi Hoshi, Hiroki Matsuoka, Michihiro Ohashi +1 more | 1990-12-11 |
| 4949695 | Device for detecting malfunction of fuel evaporative purge system | Kouji Uranishi | 1990-08-21 |
| 4930479 | Irregular combustion determining device for an internal combustion engine | Norio Shibata, Shinichi Abe | 1990-06-05 |
| 4915078 | Fuel injection control device of an internal combustion engine | Yukihiro Sonoda | 1990-04-10 |
| 4559599 | Optimum shift position indication using successive two-dimensional data maps | Nobuo Habu, Yuuichi Kato, Michio Furuhashi, Taiyo Kawai, Junichi Saiki +2 more | 1985-12-17 |