Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8558459 | Electronic ballast and method for operating an electrical lamp | Olaf Busse | 2013-10-15 |
| 8319446 | Circuit for controlling a fluorescent lamp, method for operating the circuit, and system comprising the circuit | Wolfgang Hierl, Thomas Pollischansky, Harald Schmitt, Raphael Stocker, Arwed Storm | 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 |
| 7863830 | Electronic ballast and method for operating an electric lamp | Kay Schmidtmann | 2011-01-04 |
| 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 |
| 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 |
| 6753659 | Operating device for discharge lamps having a preheating device | Olaf Busse, Michael Weirich | 2004-06-22 |
| 6657403 | Circuit arrangement for operating a fluorescent lamp | Michael Weirich | 2003-12-02 |
| 6555970 | Ballast for gas discharge lamps with shutdown of the filament heating | Michael Weirich | 2003-04-29 |
| 6198231 | Circuit configuration for operating at least one discharge lamp | Bernd Rudolph, Michael Weirich | 2001-03-06 |