Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4561935 | Process for removing anthraquinone type scale | Kazuaki Sakai, Kazuhiko Chiba | 1985-12-31 |
| 4481073 | Process for removing anthraquinone type scale | Kazuaki Sakai, Kazuhiko Chiba | 1984-11-06 |
| 4257851 | Purification of naphthoquinone | Ryo Matsuura, Kazuaki Sakai, Yorinobu Yamada, Kowzo Bandow | 1981-03-24 |