Issued Patents 1997
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 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 |