Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4869735 | Adsorbent for arsenic compound and method for removing arsenic compound from combustion gas | Masaki Miyazawa, Norihisa Kobayashi, Hiromu Takatsuka, Toshio Koyanagi, Touru Seto +9 more | 1989-09-26 |
| 4857276 | Apparatus for treating exhaust gas | Toru Seto, Shigeaki Mitsuoka, Norihisa Kobayashi | 1989-08-15 |
| 4796545 | Apparatus for treating combustion exhaust gas | Katsuo Hashizaki, Toshio Koyanagi | 1989-01-10 |