Issued Patents 1989
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4888422 | Process for producing dimethylaminomethyl copper phthalocyanine and/or its derivatives | Toshio Takei | 1989-12-19 |
| 4841091 | Process for producing 16-substituted prostaglandin es. | Atsuo Hazato, Seizi Kurozumi, Masahiro Koga | 1989-06-20 |
| 4810297 | Process for producing dimethylaminomethyl copper phthalocyanine and/or its derivatives | Toshio Takei | 1989-03-07 |
| 4797506 | 6-substituted prostaglandins E.sub.1 and process for producing same | Atsuo Hazato, Seizi Kurozumi | 1989-01-10 |