Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4810304 | Solid solutions of pyrrolo-(3,4-C)-pyrroles with quinacridones | Edward E. Jaffe | 1989-03-07 |
| 4801702 | Process for the preparation and conditioning or organic pigments | — | 1989-01-31 |