Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4218376 | Process for producing highly chlorinated copper phthalocyanine | Ryo Matsuura, Tomio Segawa, Yoichi Kumada, Hideo Sawada | 1980-08-19 |
| 4202828 | Process for separation of naphthoquinone and phthalic acid | Ryo Matsuura, Tatsuyoshi Komatsu, Kenji Usui | 1980-05-13 |