Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11785687 | Power converter and synchronous-asynchronous mode control | Alexey Evstifeev, Tiam Poh Lau | 2023-10-10 |
| 7525259 | Primary side regulated power supply system with constant current output | — | 2009-04-28 |
| 6914394 | Supply circuit, in particular for a discharge lamp | — | 2005-07-05 |
| 6753659 | Operating device for discharge lamps having a preheating device | Olaf Busse, Bernhard Schemmel | 2004-06-22 |
| 6741040 | Operating device for lamps with a regulated SEPIC converter | — | 2004-05-25 |
| 6690122 | Lamp ballast with SEPIC converter | — | 2004-02-10 |
| 6657403 | Circuit arrangement for operating a fluorescent lamp | Bernhard Schemmel | 2003-12-02 |
| 6555970 | Ballast for gas discharge lamps with shutdown of the filament heating | Bernhard Schemmel | 2003-04-29 |
| 6198231 | Circuit configuration for operating at least one discharge lamp | Bernhard Schemmel, Bernd Rudolph | 2001-03-06 |
| 5373697 | Hydraulic fluid system and dump valve mechanism for a hydrostatic transaxle | Norman E. Jolliff | 1994-12-20 |
| 5177967 | Hydrostatic transaxle | Roland L. von Kaler, Dale I. Havens | 1993-01-12 |