Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8587210 | Electronic ballast for operating at least one discharge lamp | Maximilian Gerber, Arwed Storm | 2013-11-19 |
| 8390209 | Circuit arrangement for conversion of an input AC voltage to a DC voltage, retrofit lamp having a circuit arrangement such as this, as well as a lighting system | Harald Dellian | 2013-03-05 |
| 8054003 | Switch-off time regulation system for an inverter for driving a lamp | — | 2011-11-08 |
| 7564673 | Control circuit for converters | Oskar Schallmoser | 2009-07-21 |
| 7394207 | Circuit arrangement having a full bridge with switching load relief for operating lamps | Felix Franck | 2008-07-01 |
| 7274578 | Converter circuit having class E converter modules | Reinhard Lecheler | 2007-09-25 |
| 6768271 | Ballast and method for operating a lamp | Olaf Busse, Markus Heckmann | 2004-07-27 |
| 6747418 | Device and method for preheating the coil electrodes of a fluorescent lamp | — | 2004-06-08 |
| 5493182 | Fluorescent lamp operating circuit, permitting dimming of the lamp | Christoph Kreutner | 1996-02-20 |