Issued Patents 2004
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 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 |