Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4851049 | Thermostable bismuth vanadate/molybdate pigments | Henning Wienand, Werner Ostertag, Christoph Schwidetzky | 1989-07-25 |
| 4844741 | Thermostable rutile mixed phase pigments | Roland Bauer, Egon Liedek, Guenter Etzrodt | 1989-07-04 |