Issued Patents All Time
Showing 1–25 of 34 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6494087 | Misfire state discrimination system of internal combustion engine | Gaku Hatano, Yuji Fujiki, Kojiro Tsutsumi, Masahiro Yamada, Hisashi Daicho | 2002-12-17 |
| 5850820 | Evaporative fuel control system for internal combustion engines | Kojiro Tsutsumi, Shigeto Kashiwabara, Sachito Fujimoto | 1998-12-22 |
| 5636514 | Catalyst deterioration-determining system for internal combustion engines | — | 1997-06-10 |
| 5526798 | Air-fuel ratio control system for internal combustion engines | — | 1996-06-18 |
| 5513522 | Abnormality-detecting device for exhaust gas component concentration sensor of internal combustion engine | Masataka Chikamatsu | 1996-05-07 |
| 5495842 | Evaporative fuel-processing system for internal combustion engines | Masayoshi Yamanaka, Kazutomo Sawamura, Hiroshi Maruyama | 1996-03-05 |
| 5485382 | Oxygen sensor deterioration-detecting system for internal combustion engines | Toshihiko Sato, Naoki Iida, Yoichi Iwata | 1996-01-16 |
| 5477842 | Evaporative fuel-processing system for internal combustion engines | Hiroshi Maruyama, Masayoshi Yamanaka, Kazutomo Sawamura | 1995-12-26 |
| 5427075 | Evaporative emission control system for internal combustion engines | Masayoshi Yamanaka, Kazutomo Sawamura, Hiroshi Maruyama | 1995-06-27 |
| 5396765 | Oxygen sensor deterioration-detecting device for internal combustion engines | Hiroshi Maruyama, Tsuyoshi Takizawa, Toshihiko Sato, Hiroshi Ito, Takayoshi Nakayama | 1995-03-14 |
| 5396873 | Evaporative fuel-processing system for internal combustion engines | Masayoshi Yamanaka, Hiroshi Maruyama, Masataka Chikamatsu, Kenichi Maeda, Kazutomo Sawamura | 1995-03-14 |
| 5394691 | Air-fuel ratio control system for internal combustion engines having a plurality of cylinder groups | — | 1995-03-07 |
| 5386695 | Air-fuel ratio control system for internal combustion engines, having catalytic converter deterioration-detecting function | Yoichi Iwata, Toshihiko Sato, Tsuyoshi Takizawa, Takayoshi Nakayama | 1995-02-07 |
| 5381657 | Catalyst deterioration-detecting system for internal combustion engines | Tsuyoshi Takizawa, Yoichi Iwata, Toshihiko Sato, Takayoshi Nakayama | 1995-01-17 |
| 5379591 | Air-fuel ratio control system for internal combustion engines | Yoichi Iwata, Naoki Iida, Tsuyoshi Takizawa, Toshihiko Sato, Takayoshi Nakayama | 1995-01-10 |
| 5375416 | Air-fuel ratio sensor deterioration-detecting device for internal combustion engines | Yoichi Iwata, Toshihiko Sato, Tsuyoshi Takizawa, Takayoshi Nakayama | 1994-12-27 |
| 5325664 | System for determining deterioration of catalysts of internal combustion engines | Toshihiko Sato, Katuhiro Kumagai, Hiroshi Maruyama, Yoichi Iwata, Tsuyoshi Takizawa +8 more | 1994-07-05 |
| 5251592 | Abnormality detection system for evaporative fuel control systems of internal combustion engines | Shigetaka Kuroda, Kazutomo Sawamura, Masatoshi Udagawa, Youichi Iwata, Takushi Toda | 1993-10-12 |
| 5113835 | Method of controlling exhaust gas recirculation for an internal combustion engine | Shigeto Kashiwabara, Takahiko Kaga | 1992-05-19 |
| 5060604 | Method of detecting failure of a valve timing changeover control system of an internal combustion engine | Yosuke Tachibana | 1991-10-29 |
| 5033290 | Method of detecting failure of a valve timing changeover control system of an internal combustion engine | Kiyoshi Tsukimura, Yosuke Tachibana, Isao Yahata | 1991-07-23 |
| 5009203 | Control method for valve-timing changeover in engine | — | 1991-04-23 |
| 4996954 | Method for detecting an irregularity in valve-timing changeover in an engine | Yuzuru Koike, Takashi Sato, Masatoshi Obata | 1991-03-05 |
| 4966110 | Intake air flow control apparatus of internal-combustion engine | Yuzuru Koike, Yosuke Tachibana, Kiyoshi Tsukimura | 1990-10-30 |
| 4960083 | Failsafe method in connection with valve timing-changeover control for internal combustion engines | Isao Yahata | 1990-10-02 |