Inventor · disambiguated record
Donald C. D. Chang
Also filed as: CHANG DONALD · CHANG DONALD C · CHANG DONALD C D · CHANG DONALD CHIN-DONG
65 granted patents·1,525 citations·filing 1987–2021
99Inventor score
Files withDIRECTV GROUP INC25CHANG DONALD C D16SPATIAL DIGITAL SYSTEMS INC16BAYLOR COLLEGE MEDICINE3CHANG DONALD CHIN-DONG3
Top patents by PatentIndex Score
65 records- 0199US8767615B2Concurrent airborne communication methods and systemsCHANG DONALD C D·Filed 2012·Granted Jul 1, 2014·58 cites·20 claims
- 0297US7609198B2Apparatus and method for radar imaging by measuring spatial frequency componentsSPATIAL DIGITAL SYSTEMS INC·Filed 2008·Granted Oct 27, 2009·100 cites·29 claims
- 0394US9621254B2Communications architectures via UAVCHANG DONALD C D·Filed 2013·Granted Apr 11, 2017·16 cites·23 claims
- 0494US8098612B2Apparatus and method for remote beam forming for satellite broadcasting systemsCHANG DONALD CHIN-DONG·Filed 2008·Granted Jan 17, 2012·27 cites·25 claims
- 0594US8035562B2Digital beam-forming apparatus and technique for a multi-beam global positioning system (GPS) receiverSPATIAL DIGITAL SYSTEMS INC·Filed 2010·Granted Oct 11, 2011·25 cites·17 claims
- 0694US4970154AMethod for inserting foreign genes into cells using pulsed radiofrequencyBAYLOR COLLEGE MEDICINE·Filed 1988·Granted Nov 13, 1990·222 cites·9 claims
- 0794US4822470AMethod of and apparatus for cell poration and cell fusion using radiofrequency electrical pulsesBAYLOR COLLEGE MEDICINE·Filed 1987·Granted Apr 18, 1989·220 cites·24 claims
- 0893US6895217B1Stratospheric-based communication system for mobile users having adaptive interference rejectionDIRECTV GROUP INC·Filed 2000·Granted May 17, 2005·69 cites·17 claims
- 0992US9780859B2Multi-user MIMO via active scattering platformsCHANG DONALD C D·Filed 2014·Granted Oct 3, 2017·12 cites·28 claims
- 1092US7257418B1Rapid user acquisition by a ground-based beamformerDIRECTV GROUP INC·Filed 2000·Granted Aug 14, 2007·59 cites·23 claims
- 1192US6941138B1Concurrent communications between a user terminal and multiple stratospheric transponder platformsDIRECTV GROUP INC·Filed 2000·Granted Sep 6, 2005·79 cites·80 claims
- 1291US8232918B2Digital beam-forming apparatus and technique for a multi-beam global positioning system (GPS) receiverCHANG DONALD CHIN-DONG·Filed 2011·Granted Jul 31, 2012·18 cites·4 claims
- 1391US7786933B2Digital beam-forming apparatus and technique for a multi-beam global positioning system (GPS) receiverSPATIAL DIGITAL SYSTEMS INC·Filed 2008·Granted Aug 31, 2010·28 cites·9 claims
- 1491US6757546B1Synchronization method and apparatus for multi-platform communication systemDIRECTV GROUP INC·Filed 2000·Granted Jun 29, 2004·35 cites·20 claims
- 1590US8862050B2Polarization diversity with portable devices via wavefront muxing techniquesCHANG DONALD C D·Filed 2011·Granted Oct 14, 2014·8 cites·20 claims
- 1689US10003399B2Coherent power combining via wavefront multiplexing on deep space spacecraftSPATIAL DIGITAL SYSTEMS INC·Filed 2015·Granted Jun 19, 2018·6 cites·12 claims
- 1789US6756937B1Stratospheric platforms based mobile communications architectureDIRECTV GROUP INC·Filed 2000·Granted Jun 29, 2004·43 cites·58 claims
- 1888US9793977B2Systems for recovery communications via airborne platformsSPATIAL DIGITAL SYSTEMS INC·Filed 2017·Granted Oct 17, 2017·5 cites·19 claims
- 1988US7834807B2Retro-directive ground-terminal antenna for communication with geostationary satellites in slightly inclined orbitsSPATIAL DIGITAL SYSTEMS INC·Filed 2008·Granted Nov 16, 2010·9 cites·30 claims
- 2087US9559416B2Accessing LP transponders with CP terminals via wavefront multiplexing techniquesSPATIAL DIGITAL SYSTEMS INC·Filed 2013·Granted Jan 31, 2017·5 cites·18 claims
- 2187US9435893B2Digital beam-forming apparatus and technique for a multi-beam global positioning system (GPS) receiverCHANG DONALD C D·Filed 2012·Granted Sep 6, 2016·7 cites·18 claims
- 2287US9065591B2Methods and apparatus for polarization diversity with portable devices via wavefront muxing techniquesSPATIAL DIGITAL SYSTEMS INC·Filed 2014·Granted Jun 23, 2015·5 cites·20 claims
- 2386US6990314B1Multi-node point-to-point satellite communication system employing multiple geo satellitesDIRECTV GROUP INC·Filed 2000·Granted Jan 24, 2006·39 cites·19 claims
- 2486US5304486AMethod of and apparatus for cell portion and cell fusion using radiofrequency electrical pulseBAYLOR COLLEGE MEDICINE·Filed 1990·Granted Apr 19, 1994·90 cites·12 claims
- 2584US9935647B2Broadband digital beam forming system including wavefront multiplexers and narrowband digital beam forming modulesSPATIAL DIGITAL SYSTEMS INC·Filed 2016·Granted Apr 3, 2018·3 cites·20 claims
- 2684US9749033B2Smart ground-terminal antenna for geostationary satellites in slightly inclined orbitsSPATIAL DIGITAL SYSTEMS INC·Filed 2014·Granted Aug 29, 2017·4 cites·20 claims
- 2784US9712235B2Resource allocation in PON networks via wave-front multiplexing and de-multiplexingSPATIAL DIGITAL SYSTEMS INC·Filed 2015·Granted Jul 18, 2017·3 cites·20 claims
- 2884US6785553B2Position location of multiple transponding platforms and users using two-way ranging as a calibration reference for GPSDIRECTV GROUP INC·Filed 2001·Granted Aug 31, 2004·56 cites·14 claims
- 2984US6751458B1Architecture utilizing frequency reuse in accommodating user-link and feeder-link transmissionsDIRECTV GROUP INC·Filed 2000·Granted Jun 15, 2004·28 cites·21 claims
- 3083US9596024B2Multi-channel communication optimization methods and systemsSPATIAL DIGITAL SYSTEMS INC·Filed 2013·Granted Mar 14, 2017·4 cites·17 claims
- 3183US7400857B2Communication system using multiple link terminalsDIRECTV GROUP INC·Filed 2001·Granted Jul 15, 2008·31 cites·20 claims
- 3283US7317916B1Stratospheric-based communication system for mobile users using additional phased array elements for interference rejectionDIRECTV GROUP INC·Filed 2000·Granted Jan 8, 2008·26 cites·6 claims
- 3381US9882641B2Resource allocation in PON networks via wave-front multiplexing and de-multiplexingSPATIAL DIGITAL SYSTEMS INC·Filed 2017·Granted Jan 30, 2018·2 cites·5 claims
- 3481US7339520B2Phased array terminal for equatorial satellite constellationsDIRECTV GROUP INC·Filed 2000·Granted Mar 4, 2008·39 cites·21 claims
- 3579US7890052B2Stratospheric-based communication system for mobile users using additional phased array elements for interference rejectionDIRECTV GROUP INC·Filed 2007·Granted Feb 15, 2011·7 cites·24 claims
- 3679US6914557B2Micro cell architecture for mobile user tracking communication systemDIRECTV GROUP INC·Filed 2001·Granted Jul 5, 2005·17 cites·26 claims
- 3778US8953728B2System for processing data streamsCHANG DONALD C D·Filed 2012·Granted Feb 10, 2015·4 cites·20 claims
- 3878US6963548B1Coherent synchronization of code division multiple access signalsDIRECTV GROUP INC·Filed 2000·Granted Nov 8, 2005·20 cites·12 claims
- 3975US7809403B2Stratospheric platforms communication system using adaptive antennasDIRECTV GROUP INC·Filed 2001·Granted Oct 5, 2010·15 cites·17 claims
- 4072US8107569B2Method and apparatus for channel bonding using a multiple-beam antennaCHANG DONALD CHIN-DONG·Filed 2008·Granted Jan 31, 2012·7 cites·33 claims
- 4170US9608756B2Concurrent airborne communication methods and systemsSPATIAL DIGITAL SYSTEMS INC·Filed 2014·Granted Mar 28, 2017·1 cites·9 claims
- 4270US6868269B1Integrating coverage areas of multiple transponder platformsDIRECTV GROUP INC·Filed 2000·Granted Mar 15, 2005·11 cites·50 claims
- 4369US9848094B2Mobile scanner via private data on cloudCHANG DONALD C D·Filed 2015·Granted Dec 19, 2017·1 cites·20 claims
- 4469US8773307B2Wide null Forming system with beamformingCHANG DONALD C D·Filed 2010·Granted Jul 8, 2014·2 cites·20 claims
- 4569US8706167B2Communication system for mobile users using adaptive antenna with auxiliary elementsDIRECTV GROUP INC·Filed 2013·Granted Apr 22, 2014·2 cites·23 claims
- 4668US9762309B2Flexible multi-channel amplifiers via wavefront muxing techniquesCHANG DONALD C D·Filed 2013·Granted Sep 12, 2017·2 cites·14 claims
- 4768US6920309B1User positioning technique for multi-platform communication systemDIRECTV GROUP INC·Filed 2000·Granted Jul 19, 2005·10 cites·36 claims
- 4867US8817694B2Apparatus and method for remote beam forming for DBS satellitesCHANG DONALD C D·Filed 2011·Granted Aug 26, 2014·1 cites·40 claims
- 4966US6763242B1Resource assignment system and method for determining the sameDIRECTV GROUP INC·Filed 2000·Granted Jul 13, 2004·9 cites·19 claims
- 5065US7046718B1Coherent phase synchronous code division multiple access communications from multiple transponder platformsDIRECTV GROUP INC·Filed 2000·Granted May 16, 2006·8 cites·15 claims
Showing the top 50 of 65 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →