Issued Patents All Time
Showing 26–30 of 30 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4535131 | Process for producing partially hydrolyzed acrylamide polymer | Ryoji Handa, Norimasa Yoshida | 1985-08-13 |
| 4455411 | Process for preparing acrylamide polymers | Ryoji Handa, Kenzo Ariyama, Osamu Okushima, Nobuo Kurashige | 1984-06-19 |
| 4313863 | Modification of acrylamide polymers | Ryoji Handa, Norimasa Yoshida, Akihisa Furuno | 1982-02-02 |
| 4306045 | Process for producing acrylamide polymers | Norimasa Yoshida, Yasuo Ogawa, Ryoji Handa, Nobuo Kurashige, Akihisa Furuno | 1981-12-15 |
| 4306048 | Method for preparing acrylamide polymers | Norimasa Yoshida, Yasuo Ogawa, Ryoji Handa, Susumu Seki, Nobuo Kurashige +1 more | 1981-12-15 |