Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4844741 | Thermostable rutile mixed phase pigments | Helmut Knittel, Egon Liedek, Guenter Etzrodt | 1989-07-04 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4844741 | Thermostable rutile mixed phase pigments | Helmut Knittel, Egon Liedek, Guenter Etzrodt | 1989-07-04 |