Issued Patents All Time
Showing 1–23 of 23 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10432021 | Emergency inverter and emergency lighting system | Xi Shen, James Nourse, Han Lu | 2019-10-01 |
| 9035571 | Electronic ballast with dimming circuit | Robert Erhardt, William L. Keith, Raman Nair Harish Gopala Pillai, Ningliang Mi, Srinivasa Baddela | 2015-05-19 |
| 7256548 | Electric circuit for igniting a discharge lamp, and electric component module and discharge lamp incorporating such an electric circuit | Johannes M. Van Meurs | 2007-08-14 |
| 6696800 | High frequency electronic ballast | Jerry Kramer, Hendrik Anton Van Esveld, Ronald Hans Van Der Voort | 2004-02-24 |
| 6686703 | High frequency electronic ballast | Robert Erhardt, Oscar Deurloo, Hendrik Anton Van Esveld, Winston Donald Couwenberg, Ronald Hans Van Der Voort | 2004-02-03 |
| 6232726 | Ballast scheme for operating multiple lamps | — | 2001-05-15 |
| 6182367 | Power-driven work tool | — | 2001-02-06 |
| 6175195 | Triac dimmable compact fluorescent lamp with dimming interface | Pawel M. Gradzki | 2001-01-16 |
| 6154375 | Soft start scheme for resonant converters having variable frequency control | Naveed Majid, Fernand Raphael Cornelis Antheunes | 2000-11-28 |
| 6144169 | Triac dimmable electronic ballast with single stage feedback power factor inverter | — | 2000-11-07 |
| 6100646 | Ballast feedback scheme | Adan F. Hernandez | 2000-08-08 |
| 6087782 | Resonant mode power supply having over-power and over-current protection | Naveed Majid, Fernand Raphael Cornelis Antheunes | 2000-07-11 |
| 6043611 | Dimmable compact fluorescent lamp | Pawel M. Gradzki | 2000-03-28 |
| 6018467 | Resonant mode power supply having an efficient low power stand-by mode | Naveed Majid, Patrick E. G. Smeets | 2000-01-25 |
| 6011357 | Triac dimmable compact fluorescent lamp with low power factor | Pawel M. Gradzki | 2000-01-04 |
| 5994848 | Triac dimmable, single stage compact flourescent lamp | — | 1999-11-30 |
| 5982159 | Dimmable, single stage fluorescent lamp | Pawel M. Gradzki | 1999-11-09 |
| 5917717 | Ballast dimmer with passive power feedback control | Paulus P. B. Arts, Everaard Marie Jozef Aendekerk, Machiel A. M. Hendrix, Pawel M. Gradzki | 1999-06-29 |
| D349712 | Combustion engine driven wood splitting machine | — | 1994-08-16 |
| 5323822 | Wood splitter | — | 1994-06-28 |
| D344528 | Electrical wood splitting machine | — | 1994-02-22 |
| 4548557 | Hydraulic pump or motor with interchangeable gears | — | 1985-10-22 |
| 4341017 | Tree-pruning and clearing apparatus | — | 1982-07-27 |