Charles Hu
27Patents
13h-index
15Co-inventors
78Inventor score
Filing activity: Jun 9, 1986 → Jun 23, 2022
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5455487A | Moveable desktop light controller | Emerging Cross-Sectional Technologies | 168 | Expired |
| US5189393A | Dual technology motion sensor | Physics | 118 | Expired |
| US5598042A | Moveable desktop load controller | Emerging Cross-Sectional Technologies | 103 | Expired |
| US5406173A | Apparatus and method for adjusting lights according to the level of ambient light | Emerging Cross-Sectional Technologies | 81 | Expired |
| US5804991A | Zero crossing circuit for a relay | Electricity | 46 | Expired |
| USD294231S | Occupancy sensor | General | 44 | Expired |
| US5640113A | Zero crossing circuit for a relay | Electricity | 44 | Expired |
| US4661720A | Occupancy sensor | Physics | 34 | Expired |
| US4820938A | Low voltage motion sensor for activating a high voltage load | Physics | 33 | Expired |
| USD380452S | Wall-mounted switch | General | 31 | Expired |
| US9782114B2 | Devices and methods for body fluid sampling and analysis | Physics | 21 | Active |
| US9636051B2 | Detection meter and mode of operation | Human Necessities | 21 | Active |
| USD360842S | Motion sensor | General | 16 | Expired |
| US5124546A | Method and apparatus for refracting light to an optical detector | Emerging Cross-Sectional Technologies | 12 | Expired |
| USD369348S | Light level controller | General | 12 | Expired |
| US5124566A | Shutoff circuit for sensor controlled switch | Electricity | 12 | Expired |
| US11051734B2 | Devices and methods for body fluid sampling and analysis | Physics | 8 | Active |
| US11399744B2 | Detection meter and mode of operation | Human Necessities | 5 | Active |
| US6819509B2 | Optical isolator mounting apparatus | Physics | 5 | Expired |
| US11382544B2 | Devices and methods for body fluid sampling and analysis | Physics | 5 | Active |
| US6714366B2 | Optical component mounting apparatus | Physics | 4 | Expired |
| US6931714B2 | Optical component assembly system | Emerging Cross-Sectional Technologies | 3 | Expired |
| US11672452B2 | Devices and methods for body fluid sampling and analysis | Physics | 3 | Active |
| US7103953B2 | Method for in situ measurement of the optical offset of an optical component | Emerging Cross-Sectional Technologies | 2 | Expired |
| US7202952B2 | Fabrication and alignment device | Physics | 2 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.