Issued Patents 2011
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8049584 | Switching device | Ralf Mueller, Ralph Burckhardt, Guido Niewoehner, Hans-Peter Weyand | 2011-11-01 |
| 8035044 | Service switching device with double-break contacts | Ralph Burkhardt | 2011-10-11 |