Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8545620 | Cement accelerator | Karl Frenkenberger, Stefan Köhler, Thomas Heichele, Patrick Weiss, Alexander Dressen | 2013-10-01 |
| 8262793 | Dust free powdery building material composition | Werner Stohr, Wolfgang Seidl, Siegfried Zuern, Steffen Wache | 2012-09-11 |