Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7683282 | Mechanical switching contact | Silke Wrede | 2010-03-23 |
| 6998547 | On-load tap changer for a sequence switch | Silke Wrede | 2006-02-14 |
| 5523674 | Step switch | Dieter Dohnal, Josef Neumeyer, Wolfgang Albrecht, Rolf Lauterwald, Hans-Henning Lessmann-Mieske | 1996-06-04 |
| 5165295 | End stop for stepper for step-type transformer | Dieter Dohnal | 1992-11-24 |