Issued Patents All Time
Showing 1–16 of 16 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12237135 | Vacuum interrupter | Silke Wrede, Markus Zintl, Anniyappan Palani | 2025-02-25 |
| 11545313 | Load transfer switch for on-load tap changer, and on-load tap changer | Silke Wrede, Gregor Wilhelm, Eduard Schmidt, Stefan Herold, Elke Wuersching | 2023-01-03 |
| 11195672 | Switch element for tap changer, and tap changer | Stefan Herold, Eduard Schmidt | 2021-12-07 |
| 10192693 | Tap changer, force-storage unit, and controlled-backlash coupling therebetween | Stefan Herold, Gregor Wilhelm, Abraham Ahmadi | 2019-01-29 |
| 9640341 | On-load tap changer | Silke Wrede, Dieter Dohnal, Christian Kotz | 2017-05-02 |
| 9640339 | On-load tap changer, method for installing a load transfer switch insert in the on-load tap changer, and kerosene drain screw | Silke Wrede, Hubert Zwirglmaier | 2017-05-02 |
| 9406454 | Arrangement of vacuum switching tubes in a load transfer switch | Silke Wrede, Christian Kotz | 2016-08-02 |
| 9257246 | Stepping switch with vacuum switching tubes | Silke Wrede | 2016-02-09 |
| 9251971 | On-load tap changer | Wolfgang Albrecht, Silke Wrede | 2016-02-02 |
| 9165726 | Tap changer and vacuum switching tube for such a tap changer | Dieter Dohnal, Christian Pircher, Silke Wrede | 2015-10-20 |
| 8927886 | Load transfer switch for a tap changer | Wolfgang Albrecht, Claudia Dobler, Martin Jatta, Christian Kotz, Sebastian Rehkopf | 2015-01-06 |
| 8927885 | Mechanical switch contact | Silke Wrede | 2015-01-06 |
| 8869641 | Indexing gear train for on-load tap changers of step transformers | Gregor Wilhelm | 2014-10-28 |
| 8748758 | On-load tap changer with energy storage mechanism | Gregor Wilhelm, Silke Wrede | 2014-06-10 |
| 7652218 | Energy store | Gregor Wilhelm, Silke Wrede | 2010-01-26 |
| 7518075 | Energy accumulator | Silke Wrede | 2009-04-14 |