Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7955658 | Building material composition, especially bitumen-free sealant | Udo Windhövel, Katharina Lehmkuehler, Caroline Pfefferle | 2011-06-07 |
| 5091002 | Preparation for the water-repellent impregnation of porous mineral building materials | Eckehard Schamberg, Gotz Koerner, Herwig Fritsch, Roland Sucker | 1992-02-25 |