Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9462648 | Method and arrangement for remotely driving light emitting diodes from a three-phase power source via a single phase cable system | Wa Hing Leung, Kam Wah Siu | 2016-10-04 |
| 9445472 | Method and circuit for driving light-emitting diodes from three-phase power source | Wa Hing Leung, Kam Wah Siu | 2016-09-13 |
| 8928241 | Method and apparatus for controlling brightness of light emitting diodes | Kwok Hung Poon, Wa Hing Leung, Kam Wah Siu | 2015-01-06 |
| 6819014 | Two-wire power switch with line-powered switch controlling means | Hui Yu | 2004-11-16 |