Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5022923 | Pearl luster pigments stable to glaze and enamel | Klaus Ambrosius, Klaus-Dieter Franz | 1991-06-11 |
| 4545821 | Dispersible Berlin blue pigment | Klaus-Dieter Franz | 1985-10-08 |