Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8948347 | Method and device for checking the connection of a positive supply voltage to a subscriber access line comprising a plurality of wires | Rudolf Dollinger, Roland Krimmer, Bernhard Sieben | 2015-02-03 |
| 8107615 | Method and device for checking the function for inverting the polarity on a subscriber line comprising a plurality of wires | Rudolf Dollinger, Roland Krimmer, Bernhard Sieben | 2012-01-31 |