Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9275788 | Control transformer | Dieter Dohnal, Karsten Viereck | 2016-03-01 |
| 9123464 | Transformer with on-load tap changer | Volker Karrer, Dieter Dohnal, Karsten Viereck | 2015-09-01 |