Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| RE35654 | Mixed coupled azo pigments | John H. Platman | 1997-11-11 |
| 5246494 | Mixed coupled azo pigments | John H. Platman | 1993-09-21 |
| 4202702 | Inorganic pigment comprising a solid solution of differing spinels | — | 1980-05-13 |