Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4872885 | Dispersant for aqueous slurry of carbonaceous solid and aqueous carbonaceous solid slurry composition incorporating said dispersant therein | Hayami Ito, Shuhei Tatsumi, Yoshihiro Kajibata, Shoichi Takao, Takakiyo Goto +4 more | 1989-10-10 |
| 4870120 | Cement dispersant | Hideyuki Tahara, Hiroya Kobayashi, Tsuyoshi Hirata, Hiroshi Ito | 1989-09-26 |