Assignee
QUAN RONALD
US·45 granted patents·11 pending applications·80 citations·filing 2005–2024
Top patents by PatentIndex Score
56 records- 0187US8299852B2Method and apparatus for a gain control circuit via a high frequency signalQUAN RONALD·Filed 2011·Granted Oct 30, 2012·11 cites·9 claims
- 0285US10063194B1Low voltage tube circuitsQUAN RONALD·Filed 2017·Granted Aug 28, 2018·5 cites·20 claims
- 0385US8704533B2Method and apparatus to measure differential phase and frequency modulation distortions for audio equipmentQUAN RONALD·Filed 2010·Granted Apr 22, 2014·6 cites·15 claims
- 0485US8527268B2Method and apparatus for improving speech recognition and identifying video program material or contentQUAN RONALD·Filed 2010·Granted Sep 3, 2013·12 cites·6 claims
- 0584US12107559B2Method and apparatus to evaluate audio equipment for dynamic distortions and or differential phase and or frequency modulation effectsQUAN RONALD·Filed 2022·Granted Oct 1, 2024·1 cites·17 claims
- 0684US7550977B2Method and apparatus to measure differential phase and frequency modulation distortions for audio equipmentQUAN RONALD·Filed 2006·Granted Jun 23, 2009·10 cites·20 claims
- 0783US9820065B2Method and apparatus to evaluate audio equipment for dynamic distortions and or differential phase and or frequency modulation effectsQUAN RONALD·Filed 2017·Granted Nov 14, 2017·4 cites·20 claims
- 0881US8094818B2Method to synthesize video copy protection signalsQUAN RONALD·Filed 2005·Granted Jan 10, 2012·5 cites·4 claims
- 0980US10411009B1Field effect transistor circuitsQUAN RONALD·Filed 2018·Granted Sep 10, 2019·3 cites·7 claims
- 1076US8306403B2Content control via guide data and/or metadataQUAN RONALD·Filed 2010·Granted Nov 6, 2012·4 cites·26 claims
- 1175US10651810B1Field effect transistor circuitsQUAN RONALD·Filed 2019·Granted May 12, 2020·2 cites·7 claims
- 1275US9386385B2Method and apparatus to evaluate audio equipment via filter banks for dynamic distortions and or differential phase and frequency modulation effectsQUAN RONALD·Filed 2014·Granted Jul 5, 2016·3 cites·19 claims
- 1374US11128262B2Low voltage tube circuitsQUAN RONALD·Filed 2018·Granted Sep 21, 2021·2 cites·21 claims
- 1474US9060182B2Method and apparatus for reducing and restoring the effectiveness of a commercial skip systemQUAN RONALD·Filed 2012·Granted Jun 16, 2015·1 cites·18 claims
- 1574US8254756B2Method and apparatus for reducing and restoring the effectiveness of a commercial skip systemQUAN RONALD·Filed 2007·Granted Aug 28, 2012·2 cites·11 claims
- 1670US2025096762A1Method and apparatus to evaluate audio equipment for dynamic distortions and or differential phase and or frequency modulation effectsQUAN RONALD·Filed 2024·Application pending·0 cites
- 1769US10158957B2Method and apparatus to evaluate audio equipment for dynamic distortions and or differential phase and or frequency modulation effectsQUAN RONALD·Filed 2018·Granted Dec 18, 2018·1 cites·20 claims
- 1868US8624602B2Method and apparatus to measure differential phase and frequency modulation distortions for audio equipmentQUAN RONALD·Filed 2010·Granted Jan 7, 2014·2 cites·14 claims
- 1967US9271097B2Method and apparatus to evaluate audio equipment via filter banksQUAN RONALD·Filed 2013·Granted Feb 23, 2016·2 cites·20 claims
- 2065US8280049B2Method and apparatus for synthesizing copy protection for reducing/defeating the effectiveness or capability of a circumvention deviceQUAN RONALD·Filed 2009·Granted Oct 2, 2012·1 cites·22 claims
- 2164US10868507B2Biasing circuits for voltage controlled or output circuitsQUAN RONALD·Filed 2018·Granted Dec 15, 2020·1 cites·7 claims
- 2263US8994381B2Method and apparatus to measure differential phase and frequency modulation distortions for audio equipmentQUAN RONALD·Filed 2012·Granted Mar 31, 2015·2 cites·20 claims
- 2360US2010111496A1Method and apparatus for synthesizing or modifying a copy protection signal using a lowered signal level portionQUAN RONALD·Filed 2009·Application pending·0 cites
- 2458US11041893B2Method and apparatus to evaluate audio equipment for dynamic distortions and or differential phase and or frequency modulation effectsQUAN RONALD·Filed 2019·Granted Jun 22, 2021·0 cites·9 claims
- 2558US8428258B2Method and apparatus for providing content control via detection of modifications to a signalQUAN RONALD·Filed 2008·Granted Apr 23, 2013·0 cites·28 claims
- 2657US12597900B2Method and apparatus to evaluate audio equipment for dynamic distortions and or differential phase and or frequency modulation effectsQUAN RONALD·Filed 2023·Granted Apr 7, 2026·0 cites·17 claims
- 2757US10067177B2Method and apparatus to evaluate audio equipment via filter banks for dynamic distortions and or differential phase and frequency modulation effectsQUAN RONALD·Filed 2016·Granted Sep 4, 2018·0 cites·12 claims
- 2856US2025088396A1Method and apparatus to provide frequency translation of audio signal via switching and/or dc restorationQUAN RONALD·Filed 2024·Application pending·0 cites
- 2955US2024380374A1Method and apparatus to evaluate audio equipment for dynamic distortions and or differential phase and or frequency modulation effectsQUAN RONALD·Filed 2024·Application pending·0 cites
- 3054US10879864B2Method and apparatus to evaluate audio equipment for dynamic distortions and or differential phase and or frequency modulation effectsQUAN RONALD·Filed 2020·Granted Dec 29, 2020·0 cites·10 claims
- 3154US8526794B2Method and apparatus for synthesizing a copy protection or content control signal with improved playability of a TV setQUAN RONALD·Filed 2008·Granted Sep 3, 2013·0 cites·31 claims
- 3254US8204363B2Method and apparatus for attenuating or eliminating at least a portion of color burst modifications to a video signalQUAN RONALD·Filed 2010·Granted Jun 19, 2012·0 cites·22 claims
- 3353US11425518B2Method and apparatus to evaluate audio equipment for dynamic distortions and or differential phase and or frequency modulation effectsQUAN RONALD·Filed 2021·Granted Aug 23, 2022·0 cites·20 claims
- 3453US10418960B2Method and apparatus to evaluate audio equipment for dynamic distortions and or differential phase and or frequency modulation effectsQUAN RONALD·Filed 2019·Granted Sep 17, 2019·0 cites·10 claims
- 3552US8644680B2Method and apparatus for providing a content control signal in a media player via color burst phase modificationsQUAN RONALD·Filed 2009·Granted Feb 4, 2014·0 cites·23 claims
- 3652US8111074B2Method and apparatus to measure differential phase and frequency modulation distortions for audio equipmentQUAN RONALD·Filed 2009·Granted Feb 7, 2012·0 cites·16 claims
- 3750US12035113B2Method and apparatus to evaluate audio equipment for dynamic distortions and or differential phase and or frequency modulation effectsQUAN RONALD·Filed 2022·Granted Jul 9, 2024·0 cites·20 claims
- 3850US2012102530A1Method and apparatus for providing a programming guide via multiple receiving devicesQUAN RONALD·Filed 2010·Application pending·0 cites
- 3948US11418152B2Biasing circuits for voltage controlled or output circuitsQUAN RONALD·Filed 2020·Granted Aug 16, 2022·0 cites·19 claims
- 4048US10897681B2Method and apparatus to evaluate audio equipment for dynamic distortions and or differential phase and or frequency modulation effectsQUAN RONALD·Filed 2019·Granted Jan 19, 2021·0 cites·10 claims
- 4148US10165379B2Method and apparatus to evaluate audio equipment for dynamic distortions and or differential phase and or frequency modulation effectsQUAN RONALD·Filed 2018·Granted Dec 25, 2018·0 cites·12 claims
- 4248US9729987B2Method and apparatus to evaluate audio equipment via at least one filter for dynamic distortions and or differential phase and or frequency modulation effectsQUAN RONALD·Filed 2014·Granted Aug 8, 2017·0 cites·14 claims
- 4346US11381211B2Method and apparatus to evaluate audio equipment for dynamic distortions and or differential phase and or frequency modulation effectsQUAN RONALD·Filed 2020·Granted Jul 5, 2022·0 cites·19 claims
- 4446US10012682B2Method and apparatus to evaluate audio equipment for dynamic distortions and or differential phase and or frequency modulation effectsQUAN RONALD·Filed 2017·Granted Jul 3, 2018·0 cites·20 claims
- 4545US8643359B2Method and apparatus to measure differential phase and frequency modulation distortions for audio equipmentQUAN RONALD·Filed 2009·Granted Feb 4, 2014·0 cites·20 claims
- 4643US2012321279A1Method and apparatus for providing an interactive and or electronic programming guideQUAN RONALD·Filed 2011·Application pending·0 cites
- 4742US11177786B1Field effect transistor circuitsQUAN RONALD·Filed 2020·Granted Nov 16, 2021·0 cites·6 claims
- 4842US10299041B2Method and apparatus to evaluate audio equipment for dynamic distortions and or differential phase and or frequency modulation effectsQUAN RONALD·Filed 2018·Granted May 21, 2019·0 cites·6 claims
- 4942US10060958B2Method and apparatus to evaluate audio equipment via at least one filter for dynamic distortions and or differential phase and or frequency modulation effectsQUAN RONALD·Filed 2017·Granted Aug 28, 2018·0 cites·5 claims
- 5041US8761545B2Method and apparatus for identifying video program material or content via differential signalsQUAN RONALD·Filed 2010·Granted Jun 24, 2014·0 cites·20 claims
Showing the top 50 of 56 patent records by PatentIndex Score.
Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →