Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8372216 | Continuous method for treating the surface of metal strips | Guido Vandermeulen, Bernd Strubel, Helmut Witteler, Jessica Neumann, Walter Bertkau +4 more | 2013-02-12 |
| 7749337 | Method for the passivation of metal surfaces with polymers containing acid groups | Helmut Witteler, Walter Bertkau, Thomas Heidenfelder, Alexander Gothlich, Frank Klippel +1 more | 2010-07-06 |
| 6811673 | Method for electrolytic galvanizing using electrolytes containing alkane sulphonic acid | Gregor Brodt, Werner Hesse, Hans-Ulrich Jager | 2004-11-02 |