Yongping Xia
15Patents
11h-index
19Co-inventors
61Inventor score
Filing activity: May 6, 1994 → May 8, 2001
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5489827A | Light controller with occupancy sensor | Emerging Cross-Sectional Technologies | 341 | Expired |
| US5726644A | Lighting control system with packet hopping communication | Electricity | 281 | Expired |
| US5872429A | Coded communication system and method for controlling an electric lamp | Emerging Cross-Sectional Technologies | 183 | Expired |
| US5691605A | Electronic ballast with interface circuitry for multiple dimming inputs | Emerging Cross-Sectional Technologies | 126 | Expired |
| US5604411A | Electronic ballast having a triac dimming filter with preconditioner offset control | Emerging Cross-Sectional Technologies | 116 | Expired |
| US5650694A | Lamp controller with lamp status detection and safety circuitry | Emerging Cross-Sectional Technologies | 86 | Expired |
| US5559395A | Electronic ballast with interface circuitry for phase angle dimming control | Emerging Cross-Sectional Technologies | 70 | Expired |
| US5751115A | Lamp controller with lamp status detection and safety circuitry | Emerging Cross-Sectional Technologies | 64 | Expired |
| US5808422A | Lamp ballast with lamp rectification detection circuitry | Electricity | 48 | Expired |
| US5739645A | Electronic ballast with lamp flash protection circuit | Electricity | 27 | Expired |
| US5808423A | Lighting control for reducing energy consumption | Electricity | 13 | Expired |
| US5834906A | Instant start for an electronic ballast preconditioner having an active power factor controller | Emerging Cross-Sectional Technologies | 10 | Expired |
| US6445142B1 | Apparatus and method for remotely detecting a magnetic ballast | Electricity | 5 | Expired |
| US6487282B1 | Apparatus and method for an inbound telemetry device to sense telephone line status | Electricity | 3 | Expired |
| US6347135B1 | Apparatus and method for powering a telephone-based inbound telemetry device | Electricity | 1 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.