CITY UNIVERSITY OF HONG KONG
767Patents
724Active
767Granted
66Portfolio score
Filing activity: Aug 13, 1997 → Feb 19, 2024 · 66 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US7164255B2 | Inductive battery charger system with primary transformer windings formed in a multi-layer structure | Electricity | 288 | Expired |
| US6888438B2 | Planar printed circuit-board transformers with effective electromagnetic interference (EMI) shielding | Electricity | 212 | Expired |
| US6501364B1 | Planar printed-circuit-board transformers with effective electromagnetic interference (EMI) shielding | Electricity | 211 | Expired |
| US8917057B2 | Battery charging system | Electricity | 197 | Active |
| US6297621A | Voltage sensorless control of power converters | Emerging Cross-Sectional Technologies | 189 | Expired |
| US7872445B2 | Rechargeable battery powered portable electronic device | Electricity | 111 | Active |
| US7915858B2 | Localized charging, load identification and bi-directional communication methods for a planar inductive battery charging system | Electricity | 108 | Active |
| US8213707B2 | System and method for 3D measurement and surface reconstruction | Physics | 97 | Active |
| US6313015A | Growth method for silicon nanowires and nanoparticle chains from silicon monoxide | Emerging Cross-Sectional Technologies | 95 | Expired |
| US8040103B2 | Battery charging apparatus with planar inductive charging platform | Electricity | 94 | Active |
| US6593887B2 | Wideband patch antenna with L-shaped probe | Electricity | 77 | Expired |
| US6221154A | Method for growing beta-silicon carbide nanorods, and preparation of patterned field-emitters by chemical vapor depositon (CVD) | Emerging Cross-Sectional Technologies | 71 | Expired |
| US6304068A | Bi-directional switched-capacitor based voltage converter | Electricity | 69 | Expired |
| US8228025B2 | Electronic control method for a planar inductive battery charging apparatus | Electricity | 65 | Active |
| US8269456B2 | Secondary module for battery charging system | Electricity | 62 | Active |
| US8299753B2 | Inductive battery charger system with primary transfomer windings formed in a multi-layer structure | Electricity | 60 | Active |
| US8519668B2 | Inductive battery charger system with primary transformer windings formed in a multi-layer structure | Electricity | 59 | Active |
| US8049301B2 | Semiconductor transformers | Electricity | 55 | Active |
| US8312743B2 | Method for fabricating buried ion-exchanged waveguides using field-assisted annealing | Chemistry; Metallurgy | 53 | Active |
| US8102235B2 | Coreless printed-circuit-board (PCB) transformers and operating techniques therefor | Electricity | 53 | Active |
| US6717655B2 | Micropulse lidar system | Emerging Cross-Sectional Technologies | 41 | Expired |
| US7110269B2 | Soft-switching techniques for power inverter legs | Emerging Cross-Sectional Technologies | 37 | Expired |
| US8928429B2 | Multiple-way ring cavity power combiner and divider | Electricity | 34 | Active |
| US8676815B2 | Suffix tree similarity measure for document clustering | Physics | 29 | Active |
| US6486615B2 | Dimming control of electronic ballasts | Electricity | 26 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.