Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5895521 | Dust removing apparatus and dust removing method | Kenji Otsuka, Hiroshi Waki, Yoshio Yamashita, Satoshi Arakawa | 1999-04-20 |
| 5670445 | Cleaning agent of harmful gas and cleaning method | Koichi Kitahara, Kenji Otsuka, Hideki Fukuda | 1997-09-23 |
| 5662872 | Process for cleaning harmful gas | Takashi Shimada, Toshio Okumura | 1997-09-02 |
| 5597540 | Process for cleaning harmful gas | Noboru Akita, Takashi Shimada, Keiichi Iwata | 1997-01-28 |
| 5512262 | Process for cleaning harmful gas | Takashi Shimada, Toshio Okumura | 1996-04-30 |
| 5417948 | Process for cleaning harmful gas | Keiichi Iwata | 1995-05-23 |
| 5378444 | Process for cleaning harmful gas | Noboru Akita, Takashi Shimada, Keiichi Iwata | 1995-01-03 |