Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8792245 | Coil assembly and electrical device having such coil assembly | Kwong-Ming Ching, Chung-Hei Poon | 2014-07-29 |
| 8649189 | Power supply with single stage converter for performing power factor correction and resonant conversion | Kwong-Ming Ching, Chung-Hei Poon | 2014-02-11 |
| 8441811 | AC-DC converter | Kwong-Ming Ching, Chung-Hei Poon | 2013-05-14 |
| 8406023 | Discharge loop for power supply circuit and active control circuit thereof | — | 2013-03-26 |
| 8331113 | Resonant switching circuit for harmonic suppression of input current utilizing frequency modulation | Kwong-Ming Ching, Chung-Hei Poon | 2012-12-11 |
| 7304439 | Phase-controlled dimmable electronic ballasts for fluorescent lamps with very wide dimming range | Yiu Lam, Shu Hung Henry Chung, Ron Shu Yuen Hui | 2007-12-04 |