Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4844741 | Thermostable rutile mixed phase pigments | Helmut Knittel, Roland Bauer, Guenter Etzrodt | 1989-07-04 |
| 4830775 | Zinc and/or lead salts of carboxylic acids and their use as corrosion inhibitors | Gerhard Haegele | 1989-05-16 |