Issued Patents All Time
Showing 1–25 of 40 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9918359 | Device and method for reducing network reactions when an electric arc furnace is in operation | Klaus Krueger, Karsten Viereck, Alexei Babizki | 2018-03-13 |
| 9640341 | On-load tap changer | Klaus Hoepfl, Silke Wrede, Christian Kotz | 2017-05-02 |
| 9275788 | Control transformer | Jochen Von Bloh, Karsten Viereck | 2016-03-01 |
| 9165726 | Tap changer and vacuum switching tube for such a tap changer | Klaus Hoepfl, Christian Pircher, Silke Wrede | 2015-10-20 |
| 9123464 | Transformer with on-load tap changer | Jochen Von Bloh, Volker Karrer, Karsten Viereck | 2015-09-01 |
| 9054522 | On-load tap changer | — | 2015-06-09 |
| 8669746 | On-load tap changer comprising semiconductor switching elements | Oliver Brueckl, Hans-Henning Lessmann-Mieske | 2014-03-11 |
| 8648587 | Arrangement of a stepping switch on a control transformer | Oliver Brueckl | 2014-02-11 |
| 8624565 | On-load tap changer comprising semiconductor switching elements | Oliver Brueckl, Hans-Henning Lessmann-Mieske | 2014-01-07 |
| 8415987 | Tap switch with semiconductor switching elements | Oliver Brueckl, Hans-Henning Lessmann-Mieske | 2013-04-09 |
| 8289068 | Method for switching without any interruption between winding taps on a tap-changing transformer | Oliver Brueckl, Hans-Henning Lessmann-Mieske | 2012-10-16 |
| 7656138 | Device for regulating electrical voltage | — | 2010-02-02 |
| 7550688 | Tap changer having a switching monitoring device | Reinhold Baertl, Albert Schmidbauer | 2009-06-23 |
| 7497745 | Contact arrangement | Reinhold Baertl, Dieter Geiger, Albert Schmidbauer | 2009-03-03 |
| 7468091 | Method for dehumidifying air and air dehumidifier for oil-insulated transformers, reactance coils and step switches | Karsten Viereck, Ansgar Hinz, Reiner Brill | 2008-12-23 |
| 7463010 | Multipoint switch | Albert Schmidbauer | 2008-12-09 |
| 7449851 | Arrangement for automatically influencing a mains supply and motor drive therefor | Jochen Ermisch | 2008-11-11 |
| 7179369 | Oil filter system | Karsten Viereck | 2007-02-20 |
| 6965217 | Tap changing assembly for power transformer | Karsten Viereck | 2005-11-15 |
| 6856122 | Thyristor tap changer | Hans-Henning Lessmann-Mieske | 2005-02-15 |
| 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 |
| 6307283 | Position signalling device for a motor drive | Franz Griesbacher, Michael Holmer | 2001-10-23 |
| 6234106 | Position indicator | Josef Neumeyer | 2001-05-22 |
| 6124726 | Method of monitoring a tap selector | Manfred Stadelmayer, Karsten Viereck | 2000-09-26 |