Inventor · disambiguated record
Changhua Chen
Also filed as: CHEN CHANGHUA · GOETZ WERNER K
20 granted patents·2 pending applications·606 citations·filing 1997–2021
95Inventor score
Files withLUMILEDS LIGHTING LLC5SIFOTONICS TECH CO LTD3NANJING DEVELOP ADVANCED MFG CO LTD2SIFOTONICS TECHNOLOGIES CO LTD2AGILENT TECHNOLOGIES INC1
Top patents by PatentIndex Score
22 records- 0194US6914272B2Formation of Ohmic contacts in III-nitride light emitting devicesLUMILEDS LIGHTING LLC·Filed 2003·Granted Jul 5, 2005·40 cites·13 claims
- 0293US6657300B2Formation of ohmic contacts in III-nitride light emitting devicesLUMILEDS LIGHTING LLC·Filed 2001·Granted Dec 2, 2003·37 cites·9 claims
- 0393US6500257B1Epitaxial material grown laterally within a trench and method for producing sameAGILENT TECHNOLOGIES INC·Filed 1998·Granted Dec 31, 2002·145 cites·15 claims
- 0493US6274399B1Method of strain engineering and impurity control in III-V nitride semiconductor films and optoelectronic devicesLUMILEDS LIGHTING LLC·Filed 2000·Granted Aug 14, 2001·113 cites·11 claims
- 0591US9977187B2Polarization rotator-splitter/combiner based on silicon rib-type waveguidesSIFOTONICS TECH CO LTD·Filed 2015·Granted May 22, 2018·11 cites·37 claims
- 0691US7345323B2Formation of Ohmic contacts in III-nitride light emitting devicesPHILIPS LUMILEDS LIGHTING CO·Filed 2005·Granted Mar 18, 2008·14 cites·11 claims
- 0790US9946029B2Optical coupler having anchored cantilever structure with multi-stage inverse taper core waveguide and fabrication method thereofSIFOTONICS TECH CO LTD·Filed 2015·Granted Apr 17, 2018·8 cites·28 claims
- 0890US6194742B1Strain engineered and impurity controlled III-V nitride semiconductor films and optoelectronic devicesLUMILEDS LIGHTING LLC·Filed 1998·Granted Feb 27, 2001·135 cites·7 claims
- 0986US9429776B2Silicon-based rib-waveguide modulator and fabrication method thereofSIFOTONICS TECH CO LTD·Filed 2015·Granted Aug 30, 2016·3 cites·13 claims
- 1079US9285651B2Electro-optic silicon modulator with longitudinally nonuniform modulationSIFOTONICS TECHNOLOGIES CO LTD·Filed 2014·Granted Mar 15, 2016·3 cites·10 claims
- 1178US6495867B1InGaN/AlGaN/GaN multilayer buffer for growth of GaN on sapphireAXT INC·Filed 2000·Granted Dec 17, 2002·22 cites·4 claims
- 1276US6630695B2InGaN/AlGaN/GaN multilayer buffer for growth of GaN on sapphireFiled 2002·Granted Oct 7, 2003·21 cites·10 claims
- 1369US6888171B2Light emitting diodeDALIAN LUMING SCIENCE & TECH·Filed 2000·Granted May 3, 2005·22 cites·15 claims
- 1464US9223185B2Electro-optic silicon modulator with alternative capacitance-loaded coplanar waveguide structuresSIFOTONICS TECHNOLOGIES CO LTD·Filed 2014·Granted Dec 29, 2015·1 cites·10 claims
- 1563US5909051AMinority carrier semiconductor devices with improved stabilityHEWLETT PACKARD CO·Filed 1997·Granted Jun 1, 1999·30 cites·11 claims
- 1654US12022918B2Fastener tape, slide fastener, skin product, and method of forming fastener tapeKEE HUBEI ZIPPERS MFG LIMITED·Filed 2021·Granted Jul 2, 2024·0 cites·20 claims
- 1748US2024034673A1An energy-efficient, carbon-enriched cement production system and a method of producing cement clinkerTIANJIN CEMENT IND DESIGN & RES INST CO LTD·Filed 2020·Application pending·0 cites
- 1845US11366084B2Ultrasonic flaw detector test blockNANJING DEVELOP ADVANCED MFG CO LTD·Filed 2018·Granted Jun 21, 2022·0 cites·9 claims
- 1944US2012216281A1Systems and Methods for Providing a Computing Device Having a Secure Operating System KernelUNER ERIC RIDVAN·Filed 2011·Application pending·0 cites
- 2041US11045888B2Portable wire cutting device for sampling steel ingotNANJING DEVELOP ADVANCED MFG CO LTD·Filed 2018·Granted Jun 29, 2021·0 cites·5 claims
- 2140US9810667B2Heel test blockNANJING DEV ADVANCED MFG CO LTD·Filed 2014·Granted Nov 7, 2017·0 cites·9 claims
- 2231US6794731B2Minority carrier semiconductor devices with improved reliabilityLUMILEDS LIGHTING LLC·Filed 1998·Granted Sep 21, 2004·1 cites·14 claims
Join the waitlist — get patent alerts
Get an alert when Changhua Chen files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →