Inventor · disambiguated record
David J. Duffield
Also filed as: DUFFIELD DAVID J · DUFFIELD DAVID JAY
35 granted patents·5 pending applications·2,603 citations·filing 1989–2015
98Inventor score
Files withTHOMSON CONSUMER ELECTRONICS17THOMSON LICENSING12RCA LICENSING CORP4DUFFIELD DAVID J1DUFFIELD DAVID JAY1
Top patents by PatentIndex Score
40 records- 0199US4959720ATuner control apparatus having tune-by-label capabilityRCA LICENSING CORP·Filed 1989·Granted Sep 25, 1990·424 cites·8 claims
- 0298US4914517ATuner control apparatus having tune-by-label capability and using alphabetical label storageTHOMSON CONSUMER ELECTRONICS·Filed 1989·Granted Apr 3, 1990·249 cites·8 claims
- 0396US5398074AProgrammable picture-outside-picture displayTHOMSON CONSUMER ELECTRONICS·Filed 1994·Granted Mar 14, 1995·341 cites·13 claims
- 0496US5091785APicture-in-picture circuitry using field rate synchronizationTHOMSON CONSUMER ELECTRONICS·Filed 1989·Granted Feb 25, 1992·158 cites·20 claims
- 0595US4996597AUser programmable switching arrangementRCA LICENSING CORP·Filed 1989·Granted Feb 26, 1991·132 cites·16 claims
- 0694US5486871AAutomatic letterbox detectionTHOMSON CONSUMER ELECTRONICS·Filed 1991·Granted Jan 23, 1996·127 cites·14 claims
- 0794US5453796ASignal swap apparatus for a television receiver having an HDTV main picture signal processor and an NTSC Pix-in-Pix signal processorTHOMSON CONSUMER ELECTRONICS·Filed 1994·Granted Sep 26, 1995·179 cites·10 claims
- 0893US5113259AData transfer from an external computer to a television receiver having picture-in-picture capabilityTHOMSON CONSUMER ELECTRONICS·Filed 1990·Granted May 12, 1992·157 cites·6 claims
- 0991US5461427ATelevision receiver having the capability to associate any HDTV and any NTSC channelTHOMSON CONSUMER ELECTRONICS·Filed 1994·Granted Oct 24, 1995·125 cites·14 claims
- 1089US5047857ATelevision system with zoom capability for at least one inset pictureTHOMSON CONSUMER ELECTRONICS·Filed 1989·Granted Sep 10, 1991·61 cites·25 claims
- 1188US5111296AData transfer from a television receiver having picture-in-picture capability to an external computerTHOMSON CONSUMER ELECTRONICS·Filed 1990·Granted May 5, 1992·90 cites·2 claims
- 1287US7318099B2Method and apparatus for controlling the distribution of digitally encoded data in a networkTHOMAS LICENSING·Filed 2003·Granted Jan 8, 2008·51 cites·18 claims
- 1385US5386247AVideo display having progressively dimmed video images and constant brightness auxiliary imagesTHOMSON CONSUMER ELECTRONICS·Filed 1993·Granted Jan 31, 1995·72 cites·15 claims
- 1483US8332657B1Global copy protection system for digital home networksESKICIOGLU AHMET MURSIT·Filed 2000·Granted Dec 11, 2012·28 cites·18 claims
- 1583US4914516AFast response picture-in-picture circuitryTHOMSON CONSUMER ELECTRONICS·Filed 1989·Granted Apr 3, 1990·44 cites·9 claims
- 1681US4991022AApparatus and a method for automatically centering a video zoom and pan displayRCA LICENSING CORP·Filed 1989·Granted Feb 5, 1991·37 cites·9 claims
- 1780US5194954AAutomatic channel sampling picture-in-picture circuitryTHOMSON CONSUMER ELECTRONICS·Filed 1990·Granted Mar 16, 1993·53 cites·11 claims
- 1879US5617146ASystem for controlling updates of extended data services (EDS) dataTHOMSON CONSUMER ELECTRONICS·Filed 1995·Granted Apr 1, 1997·67 cites·19 claims
- 1977US7469420B2Key transport tamper protectionTHOMSON LICENSING·Filed 2003·Granted Dec 23, 2008·17 cites·14 claims
- 2074US7254236B1Method and system for handling two CA systems in a same receiverTHOMSON LICENSING·Filed 2000·Granted Aug 7, 2007·13 cites·19 claims
- 2174US6970068B1Apparatus and associated method for limiting access of information transferred between an electronic security device and a host deviceTHOMSON LICENSING SA·Filed 2000·Granted Nov 29, 2005·13 cites·8 claims
- 2273US7356848B1System and method of verifying authorization for communicating protected contentTHOMSON LICENSING·Filed 2000·Granted Apr 8, 2008·18 cites·19 claims
- 2372US5363143ASide by side picture display with reduced croppingTHOMSON CONSUMER ELECTRONICS·Filed 1994·Granted Nov 8, 1994·31 cites·16 claims
- 2471US5031044AInset picture centering in a pix-in-pix systemRCA LICENSING CORP·Filed 1989·Granted Jul 9, 1991·25 cites·9 claims
- 2569US5640502ABit-mapped on-screen-display device for a television receiverTHOMSON CONSUMER ELECTRONICS·Filed 1994·Granted Jun 17, 1997·29 cites·8 claims
- 2668US7420649B2Theater identification system utilizing identifiers projected through a screenTHOMSON LICENSING·Filed 2004·Granted Sep 2, 2008·7 cites·29 claims
- 2768US7289644B2Anti-piracy coding of motion picturesTHOMSON LICENSING·Filed 2004·Granted Oct 30, 2007·9 cites·8 claims
- 2867US7295281B2System and method for adaptive marking and coding of film printsTHOMSON LICENSING·Filed 2006·Granted Nov 13, 2007·3 cites·20 claims
- 2967US5451953AProgrammable remote control unit without extra key for configurationTHOMSON CONSUMER ELECTRONICS·Filed 1993·Granted Sep 19, 1995·27 cites·4 claims
- 3064US8358384B2Reduced rainbow artifacts in digital light projection systemsTHOMSON LICENSING·Filed 2005·Granted Jan 22, 2013·1 cites·22 claims
- 3161US8024752B2Method and apparatus for permitting unconfirmed viewing time with addressable pay TVTHOMSON LICENSING·Filed 2001·Granted Sep 20, 2011·4 cites·16 claims
- 3254US7551837B2Sequence counter for an audio visual streamTHOMSON LICENSING·Filed 2002·Granted Jun 23, 2009·1 cites·21 claims
- 3350US2007101357A1Broadcast conditional access system with impulse purchase capability in a two-way networkDUFFIELD DAVID J·Filed 2004·Application pending·0 cites
- 3449US8813113B1Method and system for adding a conditional access systemDUFFIELD DAVID JAY·Filed 2000·Granted Aug 19, 2014·2 cites·10 claims
- 3549US2015358657A1Broadcast conditional access system with impulse purchase capability in a two-way networkTHOMSON LICENSING·Filed 2015·Application pending·0 cites
- 3648US2015100980A1Method and system for adding a conditional access systemTHOMSON LICENSING·Filed 2014·Application pending·0 cites
- 3747US7936898B2Watermarking of motion picture printsTHOMSON LICENSING·Filed 2004·Granted May 3, 2011·0 cites·10 claims
- 3844US5294987AField to field vertical panning systemTHOMSON CONSUMER ELECTRONICS·Filed 1992·Granted Mar 15, 1994·8 cites·26 claims
- 3943US2002146125A1CA system for broadcast DTV using multiple keys for different service providers and service areasFiled 2001·Application pending·0 cites
- 4043US2005160448A1Smartcard uart for minimizing processor demands in a conditional access systemFiled 2001·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →