Issued Patents All Time
Showing 1–12 of 12 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7291980 | High-pressure mercury vapor discharge lamp with a space | Dieter Leers, Bernd Engelbrecht | 2007-11-06 |
| 6724147 | High-pressure gas discharge lamp with cooling arrangement | Holger Moench | 2004-04-20 |
| 6586892 | Method of and device for operating a gas discharge lamp | Gunther Hans Derra, Thomas Krücken, Holger Moench, Xaver Riederer | 2003-07-01 |
| 6552499 | High-pressure gas discharge lamp, and method of manufacturing same | Guenther Hans Derra, Dieter Leers, Holger Moench | 2003-04-22 |
| 6239556 | Long life discharge lamp operating circuit with reduced lamp flicker | Gunther Hans Derra, Hans G. Ganser, Thomas Krücken, Holger Moench, Rob Snijkers | 2001-05-29 |
| 6232725 | Circuit arrangement for operating a high-pressure discharge lamp | Gunther Hans Derra, Hans G. Ganser, Thomas Krücken, Holger Moench, Rob Snijkers | 2001-05-15 |
| 5689156 | Circuit arrangement for detecting the amount of deposited electrode material on the wall of a lamp vessel | Gunther Hans Derra, Hans G. Ganser, Holger Monch | 1997-11-18 |
| 5608294 | High pressure lamp operating circuit with suppression of lamp flicker | Gunther Hans Derra, Hans G. Ganser, Holger Monch | 1997-03-04 |
| 5497049 | High pressure mercury discharge lamp | — | 1996-03-05 |
| 5109181 | High-pressure mercury vapor discharge lamp | Horst Horster | 1992-04-28 |
| 4866327 | Gas discharge lamp with microporous aerogel | Horst Horster, Reinhard Kersten, Joseph G. Van Lierop | 1989-09-12 |
| 4700107 | High-pressure discharge lamp having a tungsten sheet electrode | — | 1987-10-13 |