Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10145612 | Flicker reduction in electric arc furnaces by means of flicker prediction from the state determination in the initial phase of the smelting process | Arno Doebbeler, Ralf Engels, Thomas Matschullat, Detlef Rieger | 2018-12-04 |
| 8933378 | Power supply system for a polyphase arc furnace with an indirect converter between a mains connection and a furnace transformer | Wolfgang Hörger | 2015-01-13 |
| 8653799 | Multilevel converter as reactive power compensator having active | Wolfgang Hörger | 2014-02-18 |
| 7183752 | Connection method for a static VAR compensator | Wolfgang Hörger | 2007-02-27 |
| 4507703 | System for error-protected operation of multipanel, power distribution network switches | Heinrich Blau, Bernd Gortz, Werner Grohmann, Heribert Niebergall, Hermann Waldmann | 1985-03-26 |
| 4393345 | Circuit for damping hunting by electric machines | Kurt Fork, Wolfgang Kaufhold, Hermann Waldmann | 1983-07-12 |
| 4309749 | Circuit having improved firing angle symmetry for ignition pulses in the control of a multipulse rectifier | Manfred Weibelzahl, Kurt Schaumman | 1982-01-05 |