Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4888422 | Process for producing dimethylaminomethyl copper phthalocyanine and/or its derivatives | Toshio Tanaka | 1989-12-19 |
| 4810297 | Process for producing dimethylaminomethyl copper phthalocyanine and/or its derivatives | Toshio Tanaka | 1989-03-07 |