Issued Patents 1982
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4344987 | Preparation of flaky mica pigments coated with metal oxides, and use of these pigments | Werner Ostertag, Gustav Bock | 1982-08-17 |
| 4328042 | Preparation of metallic pigments having a metallic luster | Werner Ostertag, Gustav Bock | 1982-05-04 |