Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5006590 | Process for the preparation of dispersion of water-soluble cationic polymer | Hisao Takeda | 1991-04-09 |
| 4929655 | Process for production of water-soluble polymer dispersion | Hisao Takeda | 1990-05-29 |
| 4370464 | Cationic polymer flocculant | Katsutoshi Tanaka, Hisao Takeda, Isao Miyahara | 1983-01-25 |