Issued Patents All Time
Showing 1–19 of 19 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9353864 | Oil ring for internal combustion engine | Yunzhi Gao, Junichi Takahashi, Ryo Obara, Tetsuji Miyashita, Tadahiko Watanabe | 2016-05-31 |
| 9140361 | Multi-piece oil ring | Junichi Takahashi, Takashi Ono, Takayuki Ichikawa | 2015-09-22 |
| 5885923 | Exhaust gas cleaner | Kiyohide Yoshida, Satoshi Sumiya | 1999-03-23 |
| 5824621 | Exhaust gas cleaner | Akira Abe, Kiyohide Yoshida, Satoshi Sumiya, Naoko Irite, Mika Saito | 1998-10-20 |
| 5747410 | Exhaust gas cleaner and method of cleaning exhaust gas | Kazuhiko Ogiwara, Kiyohide Yoshida, Akira Abe, Naoko Irite, Shoji Mochida +1 more | 1998-05-05 |
| 5744111 | Method for cleaning exhaust gas | Kazuhiko Ogiwara, Kiyohide Yoshida, Akira Abe, Naoko Irite, Shoji Mochida +1 more | 1998-04-28 |
| 5670444 | Exhaust gas cleaner and method for cleaning same | Kiyohide Yoshida, Akira Abe, Naoko Irite | 1997-09-23 |
| 5658542 | Exhaust gas cleaner and method for cleaning same | Kiyohide Yoshida, Akira Abe, Naoko Irite | 1997-08-19 |
| 5658543 | Exhaust gas cleaner and method for cleaning same | Kiyohide Yoshida, Akira Abe, Naoko Irite | 1997-08-19 |
| 5645804 | Method for cleaning exhaust gas containing nitrogen oxides | Satoshi Sumiya, Seiji Makino, Kiyohide Yoshida, Yoshikazu Takahashi, Masataka Furuyama +2 more | 1997-07-08 |
| 5589432 | Exhaust gas cleaner and method for cleaning same | Kiyohide Yoshida, Akira Abe, Naoko Irite | 1996-12-31 |
| 5534237 | Method of cleaning an exhaust gas and exhaust gas cleaner therefor | Kiyohide Yoshida, Akira Abe, Tatsuo Miyadera | 1996-07-09 |
| 5384110 | Exhaust gas cleaner and method of cleaning exhaust gas | Kiyohide Yoshida, Satoshi Sumiya, Akira Abe | 1995-01-24 |
| 5340548 | Exhaust gas cleaner and method of cleaning exhaust gas | Akira Abe, Satoshi Sumiya, Yoshikazu Takahashi, Kiyohide Yoshida | 1994-08-23 |
| 5320999 | Exhaust gas cleaner and method of cleaning exhaust gas | Akira Abe, Kiyohide Yoshida, Satoshi Sumiya, Nobuyuki MATSUMURA, Yoshikazu Takahashi | 1994-06-14 |
| 5290530 | Method of cleaning exhaust gas | Akira Abe, Kiyohide Yoshida, Satoshi Sumiya, Nobuyuki MATSUMURA, Yoshikazu Takahashi | 1994-03-01 |
| 5213781 | Method of cleaning nitrogen oxide containing exhaust gas | Akira Abe, Satoshi Sumiya, Yoshikazu Takahashi, Kiyohide Yoshida | 1993-05-25 |
| 5208202 | Exhaust gas cleaner and method of cleaning exhaust gas catalyst for cleaning exhaust gas | Kiyohide Yoshida, Satoshi Sumiya, Akira Abe | 1993-05-04 |
| 5141714 | Exhaust gas cleaner | Akira Obuchi, Hidenori Yoshiyama, Akihiko Ohi, Hyogoro Aoyama, Hideo Ohuchi +7 more | 1992-08-25 |