Issued Patents 2004
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6828737 | Discharge lamp operating circuit with a current regulation circuit and a circuit for detection of the proximity to capacitive operation | Markus Heckmann | 2004-12-07 |
| 6768271 | Ballast and method for operating a lamp | Markus Heckmann, Wolfram Sowa | 2004-07-27 |
| 6759813 | Operating circuit for a discharge lamp with frequency-variable ignition | Klaus Orth | 2004-07-06 |
| 6753659 | Operating device for discharge lamps having a preheating device | Bernhard Schemmel, Michael Weirich | 2004-06-22 |
| 6707262 | Discharge lamp operating circuit having a circuit for detecting the proximity to capacitive operation | Markus Heckmann | 2004-03-16 |