Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5632964 | Cleaning method for exhaust gas containing ammonia and silane | Yasu Ishii | 1997-05-27 |
| 5597540 | Process for cleaning harmful gas | Toshiya Hatakeyama, Takashi Shimada, Keiichi Iwata | 1997-01-28 |