Issued Patents All Time
Showing 26–50 of 60 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5834924 | In-rush current reduction circuit for boost converters and electronic ballasts | Kenneth D. Labudda, Dennis L. Stephens, Anand K. Upadhyay | 1998-11-10 |
| 5770925 | Electronic ballast with inverter protection and relamping circuits | Sameer Sodhi | 1998-06-23 |
| 5767631 | Power supply and electronic ballast with low-cost inverter bootstrap power source | Dennis L. Stephens, Jeffrey D. Merwin | 1998-06-16 |
| 5729098 | Power supply and electronic ballast with a novel boost converter control circuit | Dennis L. Stephens | 1998-03-17 |
| 5694006 | Single switch ballast with integrated power factor correction | — | 1997-12-02 |
| 5691691 | Power-line communication system using pulse transmission on the AC line | Jeffrey D. Merwin | 1997-11-25 |
| 5608292 | Single transistor ballast with filament preheating | Dennis L. Stephens | 1997-03-04 |
| 5586016 | Circuit for quickly energizing electronic ballast | Robert A. Priegnitz | 1996-12-17 |
| 5574336 | Flourescent lamp circuit employing a reset transistor coupled to a start-up circuit that in turn controls a control circuit | Robert A. Priegnitz | 1996-11-12 |
| 5528147 | Apparatus for detecting gas discharge lamp faults | — | 1996-06-18 |
| 5528111 | Ballast circuit for powering gas discharge lamp | Kenneth D. Labudda | 1996-06-18 |
| 5475285 | Lamp circuit limited to a booster in which the power output decreases with increasing frequency | — | 1995-12-12 |
| 5453665 | Single transistor electronic ballast | — | 1995-09-26 |
| 5434477 | Circuit for powering a fluorescent lamp having a transistor common to both inverter and the boost converter and method for operating such a circuit | Kent E. Crouse | 1995-07-18 |
| 5399944 | Ballast circuit for driving gas discharge | Peter W. Shackle | 1995-03-21 |
| 5374875 | High-power factor circuit for energizing gas discharge lamps | Peter W. Shackle | 1994-12-20 |
| 5373218 | Toggle brightening circuit for powering gas discharge lamps and method for operating gas discharge lamps | Peter W. Shackle, J. Ray Wood | 1994-12-13 |
| 5194781 | Control circuit | — | 1993-03-16 |
| 5191263 | Ballast circuit utilizing a boost to heat lamp filaments and to strike the lamps | — | 1993-03-02 |
| 5148087 | Circuit for driving a gas discharge lamp load | Mihail S. Moisin | 1992-09-15 |
| 5144195 | Circuit for driving at least one gas discharge lamp | Mihail S. Moisin | 1992-09-01 |
| 4967335 | Saturable transformer regulator for flyback power supply | — | 1990-10-30 |
| 4937731 | Power supply with automatic input voltage doubling | — | 1990-06-26 |
| 4920302 | Fluorescent lamp power supply | — | 1990-04-24 |
| 4916569 | Short circuit protection for switch mode power supply | — | 1990-04-10 |