Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5114475 | Method for the preparation of a fine-grained mixture having hydrophobic properties | Wilhelm Kamereit, Oskar Schmitt, Volker Weidmann, Otto J. Friedrich | 1992-05-19 |
| 4296207 | Antifreeze protection of roads | — | 1981-10-20 |