|
| US4339692 | 18 Nov 1980 | 13 Jul 1982 | The Nuarc Company, Inc. | Power supply for HID lamp |
| US4399391 | 10 Jun 1981 | 16 Aug 1983 | General Electric Company | Circuit for starting and operating fluorescent lamps |
| US4608523 | 16 Jan 1984 | 26 Aug 1986 | | Phase correction for series-resonant ballasts |
| US5013974 | 24 Aug 1987 | 7 May 1991 | | Electronic ballast with improved lamp current crest factor |
| US5021714 | 10 May 1990 | 4 Jun 1991 | Valmont Industries, Inc. | Circuit for starting and operating fluorescent lamps |
| US5506479 | 1 Feb 1994 | 9 Apr 1996 | Robert Bosch GmbH | Device for operating a gas-discharge lamp |
| US6100652 | 12 Nov 1998 | 8 Aug 2000 | Osram Sylvania Inc. | Ballast with starting circuit for high-intensity discharge lamps |
| US7221103 | 23 Jul 2004 | 22 May 2007 | Patent-Treuhand-Gesellschaft fur Elektrische Gluhlampen mbH | Circuit for operating high-pressure discharge lamps |
