Inventor · disambiguated record
Yasuhiko Kokami
Also filed as: KOKAMI YASUHIKO
37 granted patents·4 pending applications·776 citations·filing 1994–2020
98Inventor score
Files withRENESAS TECH CORP15RENESAS ELECTRONICS CORP8HITACHI LTD6HITACHI ULSI SYS CO LTD4HITACHI TOBU SEMICONDUCTOR LTD3
Top patents by PatentIndex Score
41 records- 0196US7294982B2Motor drive device and integrated circuit device for motor drivingRENESAS TECH CORP·Filed 2006·Granted Nov 13, 2007·23 cites·5 claims
- 0296US7158332B2Magnetic disk storage systemHITACHI ULSI SYS CO LTD·Filed 2005·Granted Jan 2, 2007·32 cites·15 claims
- 0396US6972918B2Magnetic disk memory systemHITACHI ULSI SYS CO LTD·Filed 2003·Granted Dec 6, 2005·64 cites·20 claims
- 0495US6998801B2Motor drive device and motor drive integrated circuit deviceRENESAS TECH CORP·Filed 2005·Granted Feb 14, 2006·36 cites·20 claims
- 0593US7280308B2Motor drive semiconductor integrated circuit and magnetic disk storage apparatusRENESAS TECH CORP·Filed 2005·Granted Oct 9, 2007·28 cites·20 claims
- 0693US7088063B2Motor drive device and integrated circuit device for motor drivingRENESAS TECH CORP·Filed 2004·Granted Aug 8, 2006·33 cites·8 claims
- 0793US6757129B2Magnetic disk storage apparatusRENESAS TECH CORP·Filed 2002·Granted Jun 29, 2004·42 cites·11 claims
- 0892US7492132B2Switching regulatorRENESAS TECH CORP·Filed 2006·Granted Feb 17, 2009·40 cites·4 claims
- 0992US6344721B2Semiconductor integrated circuit for brushless motor drive control and brushless motor drive control apparatusHITACHI LTD·Filed 2001·Granted Feb 5, 2002·47 cites·11 claims
- 1091US7071640B2Rotation drive control circuit of multiphases direct current motor and the start-up method thereofHITACHI ULSI SYS CO LTD·Filed 2003·Granted Jul 4, 2006·52 cites·26 claims
- 1191US7054089B2Magnetic disk storage systemHITACHI ULSI SYS CO LTD·Filed 2003·Granted May 30, 2006·28 cites·18 claims
- 1289US7723937B2Drive control device of motor and a method of start-upRENESAS TECH CORP·Filed 2007·Granted May 25, 2010·21 cites·13 claims
- 1388US7859324B2Power supply unitRENESAS ELECTRONICS CORP·Filed 2008·Granted Dec 28, 2010·22 cites·4 claims
- 1487US7848044B2VCM driver and PWM amplifierRENESAS ELECTRONICS CORP·Filed 2010·Granted Dec 7, 2010·8 cites·11 claims
- 1586US8258732B2Drive system of synchronous motorIWAJI YOSHITAKA·Filed 2009·Granted Sep 4, 2012·17 cites·9 claims
- 1684US6340873B2Semiconductor integrated circuit for brushless motor drive control and brushless motor drive control apparatusHITACHI LTD·Filed 2001·Granted Jan 22, 2002·27 cites·4 claims
- 1783US8232751B2Drive system of synchronous motorIWAJI YOSHITAKA·Filed 2009·Granted Jul 31, 2012·14 cites·9 claims
- 1882US6900604B2Drive control system for sensor-less motorHITACHI TOBU SEMICONDUCTOR LTD·Filed 2002·Granted May 31, 2005·43 cites·26 claims
- 1981US6563286B2Semiconductor integrated circuit for brushless motor drive control and brushless motor drive control apparatusHITACHI LTD·Filed 2001·Granted May 13, 2003·23 cites·4 claims
- 2080US6903894B2Magnetic disc storage apparatusRENESAS TECH CORP·Filed 2001·Granted Jun 7, 2005·15 cites·17 claims
- 2177US6771033B2Drive control system for sensor-less motorRENESAS TECH CORP·Filed 2003·Granted Aug 3, 2004·31 cites·2 claims
- 2276US7915844B2Motor driving apparatus and method for control of motor revolutionRENESAS ELECTRONICS CORP·Filed 2008·Granted Mar 29, 2011·8 cites·11 claims
- 2374US7710678B2VCM driver and PWM amplifierRENESAS TECHNOLGY CORP·Filed 2008·Granted May 4, 2010·3 cites·9 claims
- 2473US7859209B2Control device for synchronous motorRENESAS ELECTRONICS CORP·Filed 2007·Granted Dec 28, 2010·7 cites·8 claims
- 2570US8362727B2Control device for synchronous motorRENESAS ELECTRONICS CORP·Filed 2010·Granted Jan 29, 2013·2 cites·16 claims
- 2670US6975479B2Magnetic disc storage apparatusRENESAS TECH CORP·Filed 2002·Granted Dec 13, 2005·8 cites·8 claims
- 2769US7411365B2Drive control device of motor and a method of start-upRENESAS TECH CORP·Filed 2005·Granted Aug 12, 2008·6 cites·10 claims
- 2869US5818179ABrushless motor drive circuit including a linear amplifier for sending an output signal based upon the detected back electromotive force voltageHITACHI LTD·Filed 1996·Granted Oct 6, 1998·32 cites·8 claims
- 2968US5847521AMethod and apparatus for driving an electric motorHITACHI LTD·Filed 1996·Granted Dec 8, 1998·29 cites·5 claims
- 3067US7750586B2Drive control device of motor and a method of start-upRENESAS TECH CORP·Filed 2008·Granted Jul 6, 2010·5 cites·5 claims
- 3163US6801382B2Magnetic disk storage apparatusRENESAS TECH CORP·Filed 2002·Granted Oct 5, 2004·10 cites·9 claims
- 3261US8569983B2Motor driving apparatus and method for control of motor revolutionKUROSAWA MINORU·Filed 2011·Granted Oct 29, 2013·1 cites·14 claims
- 3360US7847500B2Synchronous motor control deviceRENESAS TECH CORP·Filed 2007·Granted Dec 7, 2010·4 cites·7 claims
- 3457US5569988ABrushless motor drive circuit including a linear amplifier for sending and output signal based upon the detected back electromotive force voltageHITACHI LTD·Filed 1994·Granted Oct 29, 1996·15 cites·32 claims
- 3554US11575319B2DC-DC converterRENESAS ELECTRONICS CORP·Filed 2020·Granted Feb 7, 2023·0 cites·8 claims
- 3650US2007195451A1Motor drive semiconductor integrated circuit and magnetic disk storage apparatusKOKAMI YASUHIKO·Filed 2007·Application pending·0 cites
- 3747US8004349B2Power supply unitRENESAS ELECTRONICS CORP·Filed 2010·Granted Aug 23, 2011·0 cites·3 claims
- 3846US2005036228A1Magnetic disk storage apparatusRENESAS TECH CORP·Filed 2004·Application pending·0 cites
- 3945US10302681B2Current detection circuit and semiconductor device including the sameRENESAS ELECTRONICS CORP·Filed 2017·Granted May 28, 2019·0 cites·19 claims
- 4039US2006227448A1Magnetic disk storage apparatusHITACHI TOBU SEMICONDUCTOR LTD·Filed 2006·Application pending·0 cites
- 4138US2005189892A1Drive control system for sensor-less motorHITACHI TOBU SEMICONDUCTOR LTD·Filed 2005·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →