Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5114475 | Method for the preparation of a fine-grained mixture having hydrophobic properties | Werner Siegmund, deceased, Wilhelm Kamereit, Oskar Schmitt, Volker Weidmann | 1992-05-19 |