Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7638918 | Carbon brush having a shunt wire in a carbon brush body | — | 2009-12-29 |
| 7449144 | Process for manufacturing a sliding contact piece for medium to high current densities | Wilhelm Latz, Jurgen Spangenberg | 2008-11-11 |
| 5701046 | Process for the production of multi-layered brushes and brushes obtained by the process | Eric Kammerer, Lothar Biering, Erhard Grohs, Klaus Groht, Conrad Reynvaan +2 more | 1997-12-23 |
| 5270504 | Sliding contact member for high currrent densities | Erhard Grohs, Lothar Biering, Klaus Groht, Conrad Reynvaan, Jurgen Spangenberg | 1993-12-14 |