Issued Patents All Time
Showing 1–23 of 23 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10349477 | LED double-capped lamp, for operation on an electronic ballast for a low-pressure discharge lamp, especially a fluorescent lamp, and method for operating such a lamp | Xusheng Yang, Andreas Mitze, Peter Hummel | 2019-07-09 |
| 9125281 | Method for controlling a voltage transformer for overvoltage protection, voltage transformer and operating device having a voltage transformer | — | 2015-09-01 |
| 8994285 | Electronic ballast and method for operating at least one discharge lamp | — | 2015-03-31 |
| 8749155 | Circuit assembly for operating at least one discharge lamp | — | 2014-06-10 |
| 8669707 | Electronic control gear for operating at least one LED and/or at least one discharge lamp | Maximilian Gerber, Reinhard Lecheler, Siegfried Mayer | 2014-03-11 |
| 8587210 | Electronic ballast for operating at least one discharge lamp | Maximilian Gerber, Wolfram Sowa | 2013-11-19 |
| 8441200 | Electronic ballast and method for operating at least one first and second discharge lamp | Olaf Busse, Siegfried Mayer | 2013-05-14 |
| 8379422 | Circuit arrangement comprising a voltage transformer and associated method | Siegfried Mayer | 2013-02-19 |
| 8319446 | Circuit for controlling a fluorescent lamp, method for operating the circuit, and system comprising the circuit | Wolfgang Hierl, Thomas Pollischansky, Bernhard Schemmel, Harald Schmitt, Raphael Stocker | 2012-11-27 |
| 8134297 | Ballast for a discharge lamp with adaptive preheating | Olaf Busse, Markus Heckmann, Reinhard Lecheler, Alfons Lechner, Siegfried Mayer +7 more | 2012-03-13 |
| 8093836 | Circuit arrangement and method for striking a discharge lamp | Olaf Busse, Siegfried Mayer | 2012-01-10 |
| 8085519 | Circuit arrangement for providing a DC operating voltage | — | 2011-12-27 |
| 7786683 | Circuit arrangement and method for operating at least one electric lamp and at least one LED | Olaf Busse, Markus Heckmann, Reinhard Lecheler, Alfons Lechner, Siegfried Mayer +7 more | 2010-08-31 |
| 7723920 | Drive circuit for a switchable heating transformer of an electronic ballast and corresponding method | Harald Schmitt | 2010-05-25 |
| 7327094 | Circuit arrangement and method for operating at least one electric lamp | Olaf Busse, Markus Heckmann, Reinhard Lecheler, Alfons Lechner, Siegfried Mayer +7 more | 2008-02-05 |
| 7309963 | Smoothing circuit for improving EMC | Olaf Busse, Markus Heckmann, Reinhard Lecheler, Alfons Lechner, Siegfried Mayer +7 more | 2007-12-18 |
| 7307387 | Switchable voltage converter | — | 2007-12-11 |
| 7196479 | Electronic ballast having a protective circuit for a switching transistor of a converter | — | 2007-03-27 |
| 7193373 | Electronic ballast having a converter which can continue to operate in the event of lamp failure | — | 2007-03-20 |
| 7053561 | Circuit apparatus and method for operating a lamp | Siegfried Mayer | 2006-05-30 |
| 6969975 | Circuit arrangement for power factor correction | Siegfried Mayer | 2005-11-29 |
| 6833678 | Circuit arrangement for operating discharge lamps | Siegfried Mayer | 2004-12-21 |
| 6677716 | Operating device for gas discharge lamp | Bernd Rudolph | 2004-01-13 |