Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4861872 | Alkyl-phenylcarbamate derivative of polysaccharide | Yoshio Okamoto | 1989-08-29 |
| 4818394 | Separating agent | Yoshio Okamoto, Tohru Shibata, Ichiro Okamoto, Hiroyuki Nakamura | 1989-04-04 |