Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4966992 | Process for production of aromatic hydroxycarboxylic acid | Ryuzo Ueno, Yoshiyasu Masada, Keiji Kawata | 1990-10-30 |
| 4239913 | Process for preparing 2-hydroxynaphthalenecarboxylic acids | Ryuzo Ueno, Hiroaki Tsuchiya, Yasukazu Muramoto | 1980-12-16 |