Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6643912 | Method of producing a commutator of an electrical machine | Friedrich-Otto Behrens, Stefan Ossenkopp, Martin Schwerdtle | 2003-11-11 |
| 5602438 | Roll commutator for electric motors and dynamos, and method of manufacturing it | Ludwig Reisnecker, Martin Schwertle, Winfried Brettmann, Friedrich-Otto Behrens, Peter Franz +3 more | 1997-02-11 |