Chang Hee Lee
148Patents
14h-index
213Co-inventors
89Inventor score
Filing activity: May 16, 1994 → Apr 15, 2024
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6396574B1 | Apparatus for measuring the wavelength, optical power and optical signal-to-noise ratio of each optical signal in wavelength-division multiplexing optical communication | Physics | 47 | Expired |
| US6559984B1 | Apparatus for monitoring optical path based on the identification of optical cross-connect input ports | Electricity | 28 | Expired |
| US7349631B2 | Wavelength-tunable light source and wavelength-division multiplexed transmission system using the source | Electricity | 27 | Active |
| US7773838B2 | Method and network architecture for upgrading legacy passive optical network to wavelength division multiplexing passive optical network based next-generation passive optical network | Electricity | 27 | Active |
| US7106974B2 | Low-cost WDM source with an incoherent light injected fabry-perot laser diode | Electricity | 25 | Expired |
| US6597482B1 | Multiplexing/demultiplexing apparatus for wavelength division multiplexed system and wavelength division multiplexed passive optical subscriber networks using the same apparatus | Electricity | 23 | Expired |
| US6538784B1 | Multicast-capable optical cross-connect with layered modularity | Electricity | 23 | Expired |
| US6188509A | Simple bidirectional add/drop amplifier module based on a single multiplexer | Physics | 22 | Expired |
| US7327957B2 | Wavelength-tunable light source and wavelength-division multiplexed transmission system using the source | Electricity | 21 | Expired |
| US7171123B2 | Method for decreasing and compensating the transmission loss at a wavelength-division-multiplexed passive optical network and an apparatus therefor | Electricity | 17 | Expired |
| US7515626B2 | Light source capable of lasing that is wavelength locked by an injected light signal | Electricity | 16 | Expired |
| US7593647B2 | Apparatuses and methods for automatic wavelength locking of an optical transmitter to the wavelength of an injected incoherent light signal | Electricity | 15 | Expired |
| US9410949B2 | Label-free detection of renal cancer | Physics | 15 | Active |
| US6362911B1 | Burst mode optical receiver using two amplifiers having different bandwidth | Electricity | 14 | Expired |
| US8326151B2 | Low-cost WDM source with an incoherent light injected Fabry-Perot laser diode | Electricity | 14 | Active |
| US5502366A | Battery pack coupler for camcorder with sliding lever | Emerging Cross-Sectional Technologies | 12 | Expired |
| US10919270B2 | Laminated glass and manufacturing method for laminated glass | Performing Operations; Transporting | 12 | Active |
| US6728026B2 | Dynamically tunable optical amplifier and fiber optic light source | Electricity | 12 | Expired |
| US9073752B2 | Quantum dot light emitting element and method for manufacturing the same | Electricity | 11 | Active |
| US7596317B2 | Long-reach wavelength division multiplexing passive optical networks by using the position adjustment of broadband light source | Electricity | 11 | Active |
| US8552416B2 | Quantum dot light emitting diode device and display device therewith | Electricity | 11 | Active |
| US6671045B1 | Apparatus and method for measuring optical signal-to-noise ratio | Physics | 10 | Expired |
| US11027525B2 | Curved laminated glass and manufacturing method for curved laminated glass | Performing Operations; Transporting | 10 | Active |
| US7903979B2 | Low-cost WDM source with an incoherent light injected Fabry-Perot laser diode | Electricity | 9 | Active |
| US6129556A | Computer system using a card having an expansion edge | Electricity | 9 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.