Inventor · disambiguated record
Joji Fujiwara
Also filed as: FUJIWARA JOJI
52 granted patents·8 pending applications·913 citations·filing 2005–2025
98Inventor score
Files withSKYWORKS FILTER SOLUTIONS JAPAN CO LTD14SKYWORKS SOLUTIONS INC14PANASONIC CORP8FUJIWARA JOJI7SKYWORKS PANASONIC FILTER SOLUTIONS JAPAN CO LTD5
Top patents by PatentIndex Score
60 records- 0199US10187039B2Filter devices having reduced spurious emissions from lamb wavesSKYWORKS FILTER SOLUTIONS JAPAN CO LTD·Filed 2017·Granted Jan 22, 2019·166 cites·21 claims
- 0298US9748924B2Elastic wave element with interdigital transducer electrodeSKYWORKS FILTER SOLUTIONS JAPAN CO LTD·Filed 2015·Granted Aug 29, 2017·31 cites·21 claims
- 0398US9640750B2Acoustic wave device with suppressed higher order transverse modesSKYWORKS FILTER SOLUTIONS JAPAN CO LTD·Filed 2015·Granted May 2, 2017·192 cites·20 claims
- 0498US9520857B2Electronic device including filterSKYWORKS FILTER SOLUTIONS JAPAN CO LTD·Filed 2015·Granted Dec 13, 2016·38 cites·20 claims
- 0597US11652466B2Suppression of transverse mode spurious signals in surface acoustic wave devices utilizing a dense film above gap region of interdigital transducer electrodesSKYWORKS SOLUTIONS INC·Filed 2020·Granted May 16, 2023·10 cites·10 claims
- 0697US9722573B2High frequency filter with phase compensating circuitSKYWORKS FILTER SOLUTIONS JAPAN CO LTD·Filed 2016·Granted Aug 1, 2017·17 cites·20 claims
- 0797US9246533B2Electronic device including filterSKYWORKS PANASONIC FILTER SOLUTIONS JAPAN CO LTD·Filed 2013·Granted Jan 26, 2016·43 cites·20 claims
- 0896US10135422B2Filter devices having improved attenuation characteristicsSKYWORKS FILTER SOLUTIONS JAPAN CO LTD·Filed 2016·Granted Nov 20, 2018·16 cites·20 claims
- 0996US9819329B2Ladder-type surface acoustic wave filter including series and parallel resonatorsSKYWORKS FILTER SOLUTIONS JAPAN CO LTD·Filed 2015·Granted Nov 14, 2017·14 cites·20 claims
- 1095US11677380B2Suppression of transverse mode spurious signals in surface acoustic wave devices utilizing a gap hammer structureSKYWORKS SOLUTIONS INC·Filed 2020·Granted Jun 13, 2023·7 cites·18 claims
- 1195US10979028B2Reduced temperature coefficient of frequency at filter transition band while retaining pass-band widthSKYWORKS SOLUTIONS INC·Filed 2019·Granted Apr 13, 2021·10 cites·25 claims
- 1295US9467117B2Ladder-type elastic wave filter and antenna duplexer using sameSKYWORKS FILTER SOLUTIONS JAPAN CO LTD·Filed 2014·Granted Oct 11, 2016·15 cites·20 claims
- 1395US9136458B2Elastic wave elementKOMATSU TOMOYA·Filed 2012·Granted Sep 15, 2015·28 cites·25 claims
- 1495US9065424B2Acoustic wave device with reduced higher order transverse modesNAKANISHI HIDEKAZU·Filed 2012·Granted Jun 23, 2015·26 cites·20 claims
- 1594US10097159B2Acoustic wave elements, antenna duplexers and electronic devicesSKYWORKS FILTER SOLUTIONS JAPAN CO LTD·Filed 2016·Granted Oct 9, 2018·12 cites·20 claims
- 1694US8698578B2Acoustic wave resonator and duplexer using sameNAKANISHI HIDEKAZU·Filed 2010·Granted Apr 15, 2014·23 cites·26 claims
- 1794US8618992B2Antenna duplexer and communication device using the samePANASONIC CORP·Filed 2013·Granted Dec 31, 2013·15 cites·8 claims
- 1893US10044340B2Ladder-type elastic wave filter having series and parallel resonatorsSKYWORKS FILTER SOLUTIONS JAPAN CO LTD·Filed 2016·Granted Aug 7, 2018·8 cites·20 claims
- 1993US9419584B2Antenna sharing deviceTSURUNARI TETSUYA·Filed 2011·Granted Aug 16, 2016·18 cites·17 claims
- 2093US9203376B2Ladder-type surface acoustic wave filter and duplexer including the sameSKYWORKS PANASONIC FILTER SOLUTIONS JAPAN CO LTD·Filed 2013·Granted Dec 1, 2015·14 cites·23 claims
- 2192US10141643B2High-frequency filter including matching circuitSKYWORKS FILTER SOLUTIONS JAPAN CO LTD·Filed 2015·Granted Nov 27, 2018·7 cites·7 claims
- 2291US9473107B2Multimode elastic wave deviceSKYWORKS FILTER SOLUTIONS JAPAN CO LTD·Filed 2013·Granted Oct 18, 2016·13 cites·17 claims
- 2390US8531254B2Elastic wave deviceYAMAJI TORU·Filed 2011·Granted Sep 10, 2013·14 cites·7 claims
- 2490US8487720B2Acoustic wave resonator and acoustic wave filter using the sameFUJIWARA JOJI·Filed 2011·Granted Jul 16, 2013·13 cites·8 claims
- 2590US8476991B2Elastic wave resonator, elastic wave filter, and antenna sharing device using the sameGOTO REI·Filed 2010·Granted Jul 2, 2013·14 cites·9 claims
- 2689US9722576B2Elastic wave filter and duplexer using sameSKYWORKS FILTER SOLUTIONS JAPAN CO LTD·Filed 2015·Granted Aug 1, 2017·5 cites·19 claims
- 2789US9166558B2High-frequency filterPANASONIC CORP·Filed 2012·Granted Oct 20, 2015·8 cites·22 claims
- 2889US8994472B2Antenna duplexerYAMAJI TORU·Filed 2012·Granted Mar 31, 2015·10 cites·20 claims
- 2989US7659604B2Module component and method for manufacturing the samePANASONIC CORP·Filed 2005·Granted Feb 9, 2010·22 cites·12 claims
- 3088US10491194B2Filter devices having reduced spurious emissions from lamb wavesSKYWORKS FILTER SOLUTIONS JAPAN CO LTD·Filed 2019·Granted Nov 26, 2019·4 cites·20 claims
- 3187US9425766B2Elastic wave element, and electrical apparatus and duplexer using sameFUJIWARA JOJI·Filed 2010·Granted Aug 23, 2016·10 cites·15 claims
- 3287US9203378B2Elastic wave filter, and duplexer and electronic device using sameSKYWORKS PANASONIC FILTER SOLUTIONS JAPAN CO LTD·Filed 2013·Granted Dec 1, 2015·7 cites·19 claims
- 3386US11444599B2Suppression of spurious signals in surface acoustic wave devicesSKYWORKS SOLUTIONS INC·Filed 2020·Granted Sep 13, 2022·2 cites·19 claims
- 3486US9294071B2Antenna duplexerSKYWORKS PANASONIC FILTER SOLUTIONS JAPAN CO LTD·Filed 2015·Granted Mar 22, 2016·5 cites·18 claims
- 3586US8531252B2Antenna duplexer and communication apparatus employing the sameNAKAMURA HIROYUKI·Filed 2008·Granted Sep 10, 2013·12 cites·15 claims
- 3685US8482363B2Surface acoustic wave filter device, duplexer including the same, and electronic apparatus including the sameFUJIWARA JOJI·Filed 2010·Granted Jul 9, 2013·9 cites·14 claims
- 3783US11923829B2Reduced temperature coefficient of frequency at filter transition band while retaining pass-band widthSKYWORKS SOLUTIONS INC·Filed 2021·Granted Mar 5, 2024·1 cites·20 claims
- 3882US7187071B2Composite electronic componentMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2005·Granted Mar 6, 2007·11 cites·7 claims
- 3981US9083314B2Elastic wave filter device and antenna duplexer using sameTSURUNARI TETSUYA·Filed 2010·Granted Jul 14, 2015·6 cites·20 claims
- 4081US8427259B2Elastic wave filter, and duplexer and electronic device using sameFUJIWARA JOJI·Filed 2009·Granted Apr 23, 2013·9 cites·8 claims
- 4176US2025392287A1High aspect ratio acoustic resonatorsSKYWORKS SOLUTIONS INC·Filed 2025·Application pending·0 cites
- 4275US8436778B2Antenna duplexer and communication device using the sameFUJIWARA JOJI·Filed 2009·Granted May 7, 2013·7 cites·7 claims
- 4374US8686809B2Ladder-type filter including a dielectric film having a side surface with a heightwise inclinationFUJIWARA JOJI·Filed 2011·Granted Apr 1, 2014·4 cites·2 claims
- 4473US8368486B2DuplexerPANASONIC CORP·Filed 2012·Granted Feb 5, 2013·3 cites·8 claims
- 4571US8384495B2Acoustic wave duplexerPANASONIC CORP·Filed 2009·Granted Feb 26, 2013·6 cites·10 claims
- 4666US7898360B2Surface acoustic wave filter and surface acoustic wave duplexerPANASONIC CORP·Filed 2008·Granted Mar 1, 2011·5 cites·8 claims
- 4764US2025293669A1Size reduced acoustic wave filter device with phase cancelling circuit electrically connected with shared reflectorSKYWORKS SOLUTIONS INC·Filed 2025·Application pending·0 cites
- 4861US12500570B2Shear horizontal mode acoustic wave device with multilayer interdigital transducer electrodeSKYWORKS SOLUTIONS INC·Filed 2022·Granted Dec 16, 2025·0 cites·20 claims
- 4961US8330553B2DuplexerTSURUNARI TETSUYA·Filed 2008·Granted Dec 11, 2012·3 cites·6 claims
- 5058US2024267028A1Increased dielectric film thickness reflector in a temperature compensated surface acoustic wave resonatorSKYWORKS SOLUTIONS INC·Filed 2024·Application pending·0 cites
Showing the top 50 of 60 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →