Issued Patents All Time
Showing 1–25 of 32 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8015799 | Multicylinder internal combustion engine | Kazuhito Kawashima | 2011-09-13 |
| 7275367 | Exhaust pressure-raising device for an internal combustion engine | Motoyuki Suzuki | 2007-10-02 |
| 7275364 | Exhaust emission control device of internal combustion engine | Kazuhito Kawashima, Hitoshi Toda | 2007-10-02 |
| 7216479 | Exhaust emission control system for vehicle internal combustion engine | — | 2007-05-15 |
| 7051689 | Failure diagnostic system for exhaust pressure increasing device | Kazuhito Kawashima, Hitoshi Toda | 2006-05-30 |
| 7003945 | Exhaust emission control device for internal combustion engine | — | 2006-02-28 |
| 6976356 | Exhaust gas purifier for use in internal combustion engine | Kojiro Okada, Osamu Nakayama, Kazuhito Kawashima | 2005-12-20 |
| 6968677 | Exhaust emission control apparatus for internal combustion engine | — | 2005-11-29 |
| 6938613 | Internal combustion engine | Kazuhito Kawashima, Kazuhide Iwasa | 2005-09-06 |
| 6920752 | Exhaust emission control device of internal-combustion engine | — | 2005-07-26 |
| 6892527 | Catalyst deterioration suppressing apparatus and method | Katsunori Ueda, Masaaki Kaneko, Kojiro Okada, Ishido Masanori | 2005-05-17 |
| 6892528 | Catalyst deterioration detecting apparatus | Kojiro Okada, Kinichi Iwachido, Osamu Nakayama | 2005-05-17 |
| 6840035 | Exhaust emission control system for multiple cylinder internal combustion engine | — | 2005-01-11 |
| 6817172 | Exhaust purifying apparatus for an internal combustion engine and a failure prevention method therefor | — | 2004-11-16 |
| 6751949 | Exhaust emission control device of internal-combustion engine | Kazuhito Kawashima | 2004-06-22 |
| 6729123 | Exhaust purification device for intracylindrical injection-type spark-ignition internal combustion engine | Kazuhito Kawashima | 2004-05-04 |
| 6718756 | Exhaust gas purifier for use in internal combustion engine | Kojiro Okada, Osamu Nakayama, Kazuhito Kawashima | 2004-04-13 |
| 6711892 | Exhaust gas purifier for internal combustion engines | Kojiro Okada, Tomohiro Ohashi, Naoto Yamada, Kazuo Koga | 2004-03-30 |
| 6672051 | Exhaust emission purifying device for internal combustion engine | Kazuhito Kawashima, Takuya Okamoto, Osamu Nakayama | 2004-01-06 |
| 6644021 | Exhaust gas purifying apparatus of internal combustion engine | Kojiro Okada | 2003-11-11 |
| 6558636 | Plasma type exhaust gas cleaning apparatus | Kojiro Okada, Kazuo Koga, Osamu Nakayama, Keisuke Kawamura, Kiyoshi Kawamura | 2003-05-06 |
| 6558637 | Exhaust emission purifier | Kazuo Koga, Kojiro Okada, Osamu Nakayama, Keisuke Kawamura, Kiyoshi Kawamura +1 more | 2003-05-06 |
| 6532733 | Plasma exhaust gas treatment device | Osamu Nakayama, Kazuo Koga | 2003-03-18 |
| 6487851 | Exhaust emission control device of internal combustion engine | Kojiro Okada, Takashi Dogahara | 2002-12-03 |
| 6463734 | Exhaust emission control device of internal combustion engine | Osamu Nakayama, Tetsuya Watanabe, Kazuhito Kawashima | 2002-10-15 |