Issued Patents 1994
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5302243 | Deinking method | Yoichi Ishibashi, Yoshinao Kono, Takanobu Shiroishi, Hiromichi Takahashi | 1994-04-12 |
| 5288369 | Deinking method and deinking composition | Yoichi Ishibashi, Koji Hamaguchi, Hideaki Urushibata, Hiromichi Takahashi, Takanobu Shiroishi | 1994-02-22 |
| 5282928 | Deinking composition | Hiromichi Takahashi, Yoichi Ishibashi, Takanobu Shiroishi, Yoshinao Kono | 1994-02-01 |
| 5281358 | Deinking agent | Hideaki Urushibata, Koji Hamaguchi, Hiroyoshi Hiramatsu | 1994-01-25 |