Issued Patents All Time
Showing 1–19 of 19 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6111359 | Integrated HID reflector lamp with HID arc tube in a pressed glass reflector retained in a shell housing a ballast | Dale E. Work, Gregory J. Nelson, Kent Collins, Robertus A. J. Keyser, Andrew D. Jackson +6 more | 2000-08-29 |
| 5998939 | High frequency HID lamp system | Gregory J. Nelson, Robertus A. J. Keyser, Dale E. Work, Josephus C. M. Hendricx, Oscar Deurloo +3 more | 1999-12-07 |
| 5955845 | High pressure series arc discharge lamp construction with simplified starting aid | — | 1999-09-21 |
| 5828185 | High frequency HID lamp system with lamp driven at a frequency above the audible and below the lowest lamp resonant frequency | Gregory J. Nelson, Robertus A. J. Keyser, Dale E. Work, Josephus C. M. Hendricx, Oscar Deurloo +3 more | 1998-10-27 |
| 5661367 | High pressure series arc discharge lamp construction with simplified starting aid | Andrew D. Jackson, Daniel Shumway | 1997-08-26 |
| 5187414 | Fluorescent lamp controllers | John Wong, Edmond Toy, Robert Erhardt, James A. Thomsen | 1993-02-16 |
| 5111118 | Fluorescent lamp controllers | John Wong, Edmond Toy, Robert Erhardt, James A. Thomsen | 1992-05-05 |
| 5099176 | Fluorescent lamp ballast operable from two different power supplies | John Robert Shannon | 1992-03-24 |
| 4952849 | Fluorescent lamp controllers | John Wong, Edmond Toy | 1990-08-28 |
| 4701671 | High-frequency oscillator-inverter ballast circuit for discharge lamps | Edward H. Stupp, Walter G. Steneck | 1987-10-20 |
| 4700113 | Variable high frequency ballast circuit | Edward H. Stupp | 1987-10-13 |
| 4698554 | Variable frequency current control device for discharge lamps | Edward H. Stupp | 1987-10-06 |
| 4628284 | High frequency high voltage power supply preventing simultaneous transistor conduction | Gert W. Bruning | 1986-12-09 |
| 4585974 | Varible frequency current control device for discharge lamps | Edward H. Stupp | 1986-04-29 |
| 4560908 | High-frequency oscillator-inverter ballast circuit for discharge lamps | Edward H. Stupp, Walter G. Steneck | 1985-12-24 |
| 4498031 | Variable frequency current control device for discharge lamps | Edward H. Stupp | 1985-02-05 |
| 4484108 | High frequency ballast-ignition system for discharge lamps | Edward H. Stupp, Leonard R. Guarnera | 1984-11-20 |
| 4481447 | Power supply for a magnetron | Edward H. Stupp | 1984-11-06 |
| 4453109 | Magnetic transformer switch and combination thereof with a discharge lamp | Edward H. Stupp, Walter G. Steneck, Vincent J. Spataro | 1984-06-05 |