Issued Patents All Time
Showing 1–16 of 16 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9538606 | Electronic ballast for operating at least a first and a second cascade of LEDS | Klaus Fischer, Helmut Endres | 2017-01-03 |
| 9326334 | Electronic ballast for operating at least one first cascade of LEDs | Klaus Fischer, Helmut Endres | 2016-04-26 |
| 9100997 | Method for transmitting control information from a control apparatus to an operating device for at least one light-emitting means and operating device for at least one light-emitting means | Helmut Endres, Klaus Fischer | 2015-08-04 |
| 8299647 | Switchable current supply for auxiliary current circuits in a current converter | Klaus Fischer | 2012-10-30 |
| 8217589 | Method for transmitting control information from a control device to a lamp unit as well as a corresponding illuminating system, lamp unit and control device | Helmut Endres, Klaus Fischer, Friedhelm Holtz, Karl-Heinz Krause, Friedhelm Wehlmann | 2012-07-10 |
| 8134301 | Step-up driver with minimal switching frequency | Klaus Fischer | 2012-03-13 |
| 7911148 | Circuit arrangement for operating a discharge lamp having temperature compensation | Klaus Fischer | 2011-03-22 |
| 7911154 | Electronic ballast with phase dimmer detection | Klaus Fischer | 2011-03-22 |
| 7804253 | Self-exciting step-up converter | Klaus Fischer | 2010-09-28 |
| 7795949 | Circuit for switching a voltage-controlled transistor | Klaus Fischer | 2010-09-14 |
| 7777423 | Electronic reactive current oscillation-reducing ballast | Klaus Fischer | 2010-08-17 |
| 7750583 | Electronic reactive current oscillation-reducing ballast | Klaus Fischer | 2010-07-06 |
| 7330001 | Ballast having a dimming device | Klaus Fischer | 2008-02-12 |
| 7327099 | Ballast having a dimming device | Klaus Fischer | 2008-02-05 |
| 7132802 | Method for varying the power consumption of capacitive loads | Klaus Fischer | 2006-11-07 |
| 7129648 | Interface circuit for operating capacitive loads | Klaus Fischer | 2006-10-31 |