Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4447270 | Pigments and their preparation by coating with oxides of Zr-Si-Al | Peter B. Howard | 1984-05-08 |
| 4447271 | Pigments and their preparation by coating with oxides of Si-Zr-Al | Peter B. Howard | 1984-05-08 |