Issued Patents 2003
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6529858 | Method of controlling step switches | Karsten Viereck, Mario Schmeckebier | 2003-03-04 |
| 6518771 | Method of monitoring the contact burnoff in tap changers | Rainer Frotscher | 2003-02-11 |