Inventor · disambiguated record
Toshio Ishizaki
Also filed as: ISHIZAKI TOSHIO
104 granted patents·8 pending applications·2,549 citations·filing 1991–2017
99Inventor score
Files withMATSUSHITA ELECTRIC INDUSTRIAL CO LTD89ISHIZAKI TOSHIO5PANASONIC CORP3HUAWEI TECH CO LTD2TAMURA MASAYA2
Top patents by PatentIndex Score
112 records- 0198US5719539ADielectric filter with multiple resonatorsMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1994·Granted Feb 17, 1998·110 cites·42 claims
- 0298US5396201ADielectric filter having inter-resonator coupling including both magnetic and electric couplingMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1993·Granted Mar 7, 1995·126 cites·34 claims
- 0397US6900705B2Balanced high-frequency device and balance-characteristics improving method and balanced high-frequency circuit using the sameMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2003·Granted May 31, 2005·109 cites·20 claims
- 0497US6586786B2High frequency switch and mobile communication equipmentMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2001·Granted Jul 1, 2003·67 cites·6 claims
- 0597US6456172B1Multilayered ceramic RF deviceMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2000·Granted Sep 24, 2002·99 cites·23 claims
- 0695US6985712B2RF device and communication apparatus using the sameMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2002·Granted Jan 10, 2006·53 cites·11 claims
- 0795US6603372B1Laminated notch filter and cellular phone using the sameMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2000·Granted Aug 5, 2003·53 cites·18 claims
- 0895US6570469B2Multilayer ceramic device including two ceramic layers with multilayer circuit patterns that can support semiconductor and saw chipsMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2001·Granted May 27, 2003·88 cites·25 claims
- 0994US6965284B2Dielectric filter, antenna duplexerMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2002·Granted Nov 15, 2005·51 cites·44 claims
- 1094US6304156B1Laminated dielectric antenna duplexer and a dielectric filterFiled 1999·Granted Oct 16, 2001·59 cites·6 claims
- 1193US6222431B1Balanced dielectric filterMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1999·Granted Apr 24, 2001·62 cites·18 claims
- 1293US6020799ALaminated dielectric antenna duplexer and a dielectric filterMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1997·Granted Feb 1, 2000·59 cites·5 claims
- 1392US6975271B2Antenna switch module, all-in-one communication module, communication apparatus and method for manufacturing antenna switch moduleMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2004·Granted Dec 13, 2005·65 cites·18 claims
- 1492US6784765B2Multilayer ceramic deviceMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2003·Granted Aug 31, 2004·56 cites·7 claims
- 1592US6707353B1Dielectric filterMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2000·Granted Mar 16, 2004·37 cites·7 claims
- 1691US5319324AMethod of direct bonding of crystals and crystal devicesMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1992·Granted Jun 7, 1994·58 cites·17 claims
- 1790US5589724APiezoelectric device and a packageMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1994·Granted Dec 31, 1996·51 cites·7 claims
- 1889US6768399B2Laminated bandpass filter, high frequency radio device and laminated bandpass filter manufacturing methodMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2001·Granted Jul 27, 2004·30 cites·27 claims
- 1989US6147571ADual-band multilayer bandpass filterMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1997·Granted Nov 14, 2000·71 cites·23 claims
- 2089US5581141ASurface acoustic wave filterMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1994·Granted Dec 3, 1996·45 cites·10 claims
- 2189US5473289ATemperature compensated crystal oscillatorMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1994·Granted Dec 5, 1995·69 cites·21 claims
- 2288US7479847B2Filter using piezoelectric resonatorPANASONIC CORP·Filed 2006·Granted Jan 20, 2009·17 cites·17 claims
- 2388US6995630B2High-frequency compound switch module and communication terminal using itMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2002·Granted Feb 7, 2006·38 cites·26 claims
- 2488US6835968B2High frequency switch, two-band type high frequency switch, three-band type high frequency switch, and mobile communication equipmentMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2003·Granted Dec 28, 2004·20 cites·7 claims
- 2588US6822534B2Laminated electronic component, laminated duplexer and communication deviceMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2001·Granted Nov 23, 2004·27 cites·41 claims
- 2688US6445266B1Multilayer filter having varied dielectric constant regionsMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2001·Granted Sep 3, 2002·22 cites·3 claims
- 2787US8330085B2Spread-spectrum high-frequency heating deviceISHIZAKI TOSHIO·Filed 2009·Granted Dec 11, 2012·19 cites·13 claims
- 2887US6975841B2Diplexer, and high-frequency switch and antenna duplexer using the sameMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2002·Granted Dec 13, 2005·35 cites·28 claims
- 2987US6085071AAntenna duplexerMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1998·Granted Jul 4, 2000·48 cites·23 claims
- 3086US5654681ALaminated dielectric resonator and dielectric filterMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1995·Granted Aug 5, 1997·34 cites·22 claims
- 3185US7176768B2Balanced high-frequency device and balanced high-frequency circuit using the sameMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2005·Granted Feb 13, 2007·12 cites·18 claims
- 3285US6750737B2High frequency switch and radio communication apparatus with layered body for saw filter mountingMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2002·Granted Jun 15, 2004·35 cites·11 claims
- 3385US5932950ASurface acoustic wave filterMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1996·Granted Aug 3, 1999·40 cites·38 claims
- 3483US6608534B2Matching circuit chip, filter with matching circuit, duplexer and cellular phoneMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2001·Granted Aug 19, 2003·15 cites·6 claims
- 3583US6222429B1Dielectric resonator, dielectric notch filter, and dielectric filter with optimized resonator and cavity dimensionsMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2000·Granted Apr 24, 2001·14 cites·6 claims
- 3683US5442812AAntenna switching apparatus for selectively connecting antenna to transmitter or receiverMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1994·Granted Aug 15, 1995·39 cites·25 claims
- 3782US6177853B1Multilayer filter with electrode patterns connected on different side surfaces to side electrodes and input/output electrodesMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1997·Granted Jan 23, 2001·28 cites·4 claims
- 3879US7027777B2High frequency switch and high frequency radio communication apparatusMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2002·Granted Apr 11, 2006·20 cites·22 claims
- 3979US6529096B2Dielectric filter, antenna duplexer, and communications applianceMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2000·Granted Mar 4, 2003·12 cites·5 claims
- 4079US5594394AAntenna diversity switching device with switching circuits between the receiver terminal and each antennaMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1994·Granted Jan 14, 1997·56 cites·37 claims
- 4178US6759916B2High-frequency filter device, filter device combined to a transmit-receive antenna, and wireless apparatus using the sameMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2003·Granted Jul 6, 2004·11 cites·4 claims
- 4277US7324493B23-frequency branching circuit, branching circuit and radio communication equipmentMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2001·Granted Jan 29, 2008·18 cites·50 claims
- 4377US7038557B2Antenna duplexer and mobile communication device using the sameMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2002·Granted May 2, 2006·18 cites·30 claims
- 4477US6414572B2Dielectric resonator having a frequency tuning member spirally engaged with the cavityMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2001·Granted Jul 2, 2002·10 cites·3 claims
- 4577US5847489APiezoelectric device and a packageMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1996·Granted Dec 8, 1998·28 cites·10 claims
- 4677US5714919ADielectric notch resonator and filter having preadjusted degree of couplingMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1994·Granted Feb 3, 1998·22 cites·11 claims
- 4777US5323128ADielectric filter having inter-resonator coupling including both magnetic and electric couplingMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1992·Granted Jun 21, 1994·27 cites·24 claims
- 4876US7224240B2Balanced high-frequency filter, antenna duplexer, balanced high-frequency circuit and communication apparatusMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2005·Granted May 29, 2007·8 cites·34 claims
- 4976US6801100B2Inter-digital transducer, surface acoustic wave filter and communication apparatus using the sameMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2002·Granted Oct 5, 2004·18 cites·39 claims
- 5076US6140891ADielectric laminated filterMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1997·Granted Oct 31, 2000·26 cites·18 claims
Showing the top 50 of 112 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →