Issued Patents All Time
Showing 26–29 of 29 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5645804 | Method for cleaning exhaust gas containing nitrogen oxides | Satoshi Sumiya, Seiji Makino, Kiyohide Yoshida, Yoshikazu Takahashi, Masataka Furuyama +2 more | 1997-07-08 |
| 5320999 | Exhaust gas cleaner and method of cleaning exhaust gas | Gyo Muramatsu, Akira Abe, Kiyohide Yoshida, Satoshi Sumiya, Yoshikazu Takahashi | 1994-06-14 |
| 5290530 | Method of cleaning exhaust gas | Gyo Muramatsu, Akira Abe, Kiyohide Yoshida, Satoshi Sumiya, Yoshikazu Takahashi | 1994-03-01 |
| 5141714 | Exhaust gas cleaner | Akira Obuchi, Hidenori Yoshiyama, Akihiko Ohi, Hyogoro Aoyama, Hideo Ohuchi +7 more | 1992-08-25 |