Inventor · disambiguated record
Masaru Kokubo
Also filed as: KOKUBO MASARU
51 granted patents·6 pending applications·948 citations·filing 1985–2023
99Inventor score
Top patents by PatentIndex Score
57 records- 0195US7936621B2Semiconductor integrated circuit deviceRENESAS ELECTRONICS CORP·Filed 2009·Granted May 3, 2011·18 cites·8 claims
- 0293US6870411B2Phase synchronizing circuitRENESAS TECH CORP·Filed 2002·Granted Mar 22, 2005·67 cites·20 claims
- 0390US7072242B2Semiconductor integrated circuit deviceRENESAS TECH CORP·Filed 2004·Granted Jul 4, 2006·25 cites·10 claims
- 0490US6377511B1Semiconductor integrated circuit deviceHITACHI LTD·Filed 2000·Granted Apr 23, 2002·28 cites·12 claims
- 0588US5446767AFrequency synthesizerHITACHI LTD·Filed 1993·Granted Aug 29, 1995·78 cites·97 claims
- 0687US6819626B2Semiconductor integrated circuit deviceRENESAS TECH CORP·Filed 2003·Granted Nov 16, 2004·21 cites·2 claims
- 0786US7522896B2Filter control method, signal processing circuit and integrated circuit for wireless receiverRENESAS TECH CORP·Filed 2005·Granted Apr 21, 2009·12 cites·22 claims
- 0886US6515519B1Semiconductor integrated circuit deviceHITACHI LTD·Filed 2000·Granted Feb 4, 2003·36 cites·5 claims
- 0985US6463008B2Semiconductor integrated circuit deviceHITACHI LTD·Filed 2002·Granted Oct 8, 2002·19 cites·6 claims
- 1083US7664161B2Pulse generator and the transmitter with a pulse generatorRENESAS TECH CORP·Filed 2006·Granted Feb 16, 2010·11 cites·7 claims
- 1181US6489824B2Timing-control circuit device and clock distribution systemHITACHI LTD·Filed 2001·Granted Dec 3, 2002·28 cites·10 claims
- 1281US5018134AMethod for cancelling echo in a transmitter and an apparatus thereforHITACHI LTD·Filed 1989·Granted May 21, 1991·53 cites·14 claims
- 1380US6731101B2Modulation semiconductor integrated circuit device and testing method for oscillation circuitRENASAS TECHNOLOGY CORP·Filed 2002·Granted May 4, 2004·19 cites·12 claims
- 1479US7737792B2Phase Locked loop circuit and semiconductor integrated circuit device using the sameRENESAS TECH CORP·Filed 2009·Granted Jun 15, 2010·9 cites·5 claims
- 1579US7339489B2Sensor with wireless communication functionHITACHI LTD·Filed 2004·Granted Mar 4, 2008·31 cites·7 claims
- 1678US6594197B2Semiconductor integrated circuit deviceHITACHI LTD·Filed 2002·Granted Jul 15, 2003·13 cites·2 claims
- 1777US6163585APhase-locked loop circuit and radio communication apparatus using the sameHITACHI LTD·Filed 1998·Granted Dec 19, 2000·30 cites·20 claims
- 1877US4672361ALinear interpolative analog-to-digital converterHITACHI LTD·Filed 1985·Granted Jun 9, 1987·32 cites·6 claims
- 1975US5574455ADigital to analog converter and frequency synthesizer using the converterHITACHI LTD·Filed 1995·Granted Nov 12, 1996·39 cites·78 claims
- 2074US8179733B2Semiconductor integrated circuit deviceOKUDA YUICHI·Filed 2011·Granted May 15, 2012·2 cites·2 claims
- 2174US6300807B1Timing-control circuit device and clock distribution systemHITACHI LTD·Filed 1999·Granted Oct 9, 2001·70 cites·27 claims
- 2273US7602665B2Semiconductor integrated circuit deviceRENESAS TECH CORP·Filed 2008·Granted Oct 13, 2009·4 cites·22 claims
- 2373US7504894B2Phase locked loop circuit and semiconductor integrated circuit device using the sameRENESAS TECH CORP·Filed 2006·Granted Mar 17, 2009·7 cites·5 claims
- 2472US7411805B2Semiconductor integrated circuit deviceRENESAS TECH CORP·Filed 2005·Granted Aug 12, 2008·4 cites·10 claims
- 2572US5331583ARunning-average/decimation filter for an oversampling A/D converterHITACHI LTD·Filed 1993·Granted Jul 19, 1994·25 cites·16 claims
- 2671US7138838B2Phase locked loopRENESAS TECH CORP·Filed 2004·Granted Nov 21, 2006·15 cites·19 claims
- 2771US5327459ASemiconductor integrated circuit containing an automatic equalizer including a circuit for periodically updating a plurality of tap coefficients at varying frequenciesHITACHI LTD·Filed 1991·Granted Jul 5, 1994·22 cites·17 claims
- 2869US6215364B1Variable frequency oscillator, and phase locked loop and clock synchronizer using thereofHITACHI LTD·Filed 1999·Granted Apr 10, 2001·28 cites·16 claims
- 2968US10298426B2Communication cable module and transmission loss compensation circuitHITACHI METALS LTD·Filed 2017·Granted May 21, 2019·1 cites·15 claims
- 3065US7808397B2Sensor with wireless communication functionHITACHI LTD·Filed 2007·Granted Oct 5, 2010·3 cites·6 claims
- 3164US11054285B2Pinching sensor and detection deviceHITACHI METALS LTD·Filed 2019·Granted Jul 6, 2021·0 cites·12 claims
- 3264US7031675B2FM transmitterRENESAS TECH CORP·Filed 2002·Granted Apr 18, 2006·7 cites·13 claims
- 3363US6879188B2Semiconductor integrated circuit deviceRENESAS TECH CORP·Filed 2002·Granted Apr 12, 2005·11 cites·6 claims
- 3462US6535070B2Variable frequency oscillator, and phase locked loop and clock synchronizer using thereofHITACHI LTD·Filed 2001·Granted Mar 18, 2003·9 cites·9 claims
- 3562US4796296APCM coder and decoder having function of two-wire/four-wire conversionHITACHI LTD·Filed 1985·Granted Jan 3, 1989·26 cites·5 claims
- 3661US7477676B2Spread spectrum clock generator and integrated circuit device using the spread spectrum clock generatorsRENESAS TECH CORP·Filed 2004·Granted Jan 13, 2009·12 cites·20 claims
- 3760US7446614B2Logical level converter and phase locked loop using the sameRENESAS TECH CORP·Filed 2006·Granted Nov 4, 2008·3 cites·15 claims
- 3860US4896318AMethod for cancelling echo in a transmitter and an apparatus thereforHITACHI LTD·Filed 1988·Granted Jan 23, 1990·21 cites·25 claims
- 3959US4652858AInterpolative D/A converterHITACHI LTD·Filed 1986·Granted Mar 24, 1987·15 cites·7 claims
- 4058US12333409B2Information processing device and learning recognition systemHITACHI LTD·Filed 2021·Granted Jun 17, 2025·0 cites·8 claims
- 4158US7224948B1Transmitter and radio communication terminal using the sameTTP COMM LTD·Filed 2000·Granted May 29, 2007·9 cites·14 claims
- 4257US10690696B2Acceleration sensorHITACHI LTD·Filed 2018·Granted Jun 23, 2020·0 cites·9 claims
- 4356US11618462B2In-vehicle control systemHITACHI ASTEMO LTD·Filed 2019·Granted Apr 4, 2023·0 cites·10 claims
- 4455US2025353509A1Onboard Control UnitHITACHI ASTEMO LTD·Filed 2023·Application pending·0 cites
- 4554US5305379ASemiconductor integrated deviceHITACHI LTD·Filed 1992·Granted Apr 19, 1994·34 cites·27 claims
- 4647US6324219B2Phase-locked loop circuit and radio communication apparatus using the sameHITACHI LTD·Filed 2000·Granted Nov 27, 2001·3 cites·16 claims
- 4747US5311503ATerminal apparatus for full-duplex data transmission having an echo cancellerHITACHI LTD·Filed 1992·Granted May 10, 1994·17 cites·12 claims
- 4846US7266171B2Phase-locked loop circuit and radio communication apparatus using the sameTHE TECHNOLOGY PARTNERSHIP PLC·Filed 2003·Granted Sep 4, 2007·2 cites·20 claims
- 4943US6639933B2Phase-locked loop circuit and radio communication apparatus using the sameHITACHI LTD·Filed 2001·Granted Oct 28, 2003·2 cites·20 claims
- 5043US2009096540A1Logical level converter and phase locked loop using the sameKAWAMOTO TAKASHI·Filed 2008·Application pending·0 cites
Showing the top 50 of 57 patent records by PatentIndex Score.
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