Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4873092 | Slow-releasing preparation | Ichiro Azuma, Seiichi Tokura, Shinichiro Nishimura | 1989-10-10 |
| 4833237 | Process for producing granular porous chitosan | Yoshihide Kawamura, Hiroaki Tanibe, Itsuo Kurahashi, Saburo Nakajima | 1989-05-23 |