Inventor · disambiguated record
Hiroyuki Shoji
Also filed as: SHOJI HIROYUKI
49 granted patents·10 pending applications·687 citations·filing 1996–2025
98Inventor score
Files withHITACHI LTD12SHARP KK7HITACHI AUTOMOTIVE SYSTEMS LTD5HITACHI COMP PERIPHERALS CO5MITSUBISHI ELECTRIC CORP4
Top patents by PatentIndex Score
59 records- 0196US8629661B2Bidirectional DC-DC converter and control method thereofSHIMADA TAKAE·Filed 2012·Granted Jan 14, 2014·27 cites·12 claims
- 0296US8207717B2Buck-boost DC-DC converter with auxiliary inductors for zero current switchingURUNO JUNPEI·Filed 2010·Granted Jun 26, 2012·50 cites·6 claims
- 0395US7911810B2Bi-directional DC-DC converter and method for controlling the sameHITACHI COMP PERIPHERALS CO·Filed 2010·Granted Mar 22, 2011·19 cites·2 claims
- 0493US10952089B2Communication systemMITSUBISHI ELECTRIC CORP·Filed 2017·Granted Mar 16, 2021·6 cites·2 claims
- 0592US8130515B2Bi-directional DC-DC converter and method for controlling the sameSHIMADA TAKAE·Filed 2011·Granted Mar 6, 2012·13 cites·12 claims
- 0692US7907962B2Radio communications system, base station apparatus and method of transmission power controlKYOCERA CORP·Filed 2005·Granted Mar 15, 2011·27 cites·6 claims
- 0792US7848118B2Bi-directional DC-DC converter and method for controlling the sameHITACHI COMP PERIPHERALS CO·Filed 2008·Granted Dec 7, 2010·32 cites·18 claims
- 0892US7638904B2Isolated bidirectional DC-DC converterHITACHI LTD·Filed 2005·Granted Dec 29, 2009·40 cites·13 claims
- 0991US9595841B2DC-DC converter, secondary battery charge and discharge system, and method of controlling DC-DC converterHITACHI INFORMATION & TELECOMMUNICATION ENG LTD·Filed 2015·Granted Mar 14, 2017·13 cites·17 claims
- 1089US8258706B2LED drive circuit, LED illumination component, LED illumination device, and LED illumination systemMARUYAMA YASUHIRO·Filed 2009·Granted Sep 4, 2012·18 cites·22 claims
- 1189US7551462B2Soft switching DC-DC converter including a buck converter and a boost converter sharing a common transformerHITACHI LTD·Filed 2006·Granted Jun 23, 2009·25 cites·1 claims
- 1288US8605464B2Power converter, control method of power converter, and hard disk driveSASE TAKASHI·Filed 2012·Granted Dec 10, 2013·10 cites·16 claims
- 1388US7936573B2Bi-directional DC-DC converter and control methodHITACHI LTD·Filed 2010·Granted May 3, 2011·13 cites·14 claims
- 1486US7692935B2Bi-directional DC-DC converter and control methodHITACHI LTD·Filed 2006·Granted Apr 6, 2010·22 cites·14 claims
- 1584US7812575B2Bidirectional DC-DC converter and power supply apparatus with the sameHITACHI COMP PERIPHERALS CO·Filed 2007·Granted Oct 12, 2010·22 cites·20 claims
- 1684US6683418B2Inverter type illumination lighting apparatusHITACHI LTD·Filed 2001·Granted Jan 27, 2004·33 cites·28 claims
- 1783US10461553B2Power source deviceHITACHI AUTOMOTIVE SYSTEMS LTD·Filed 2015·Granted Oct 29, 2019·5 cites·20 claims
- 1883US7187073B2Resin-molded package with cavity structureNEC ELECTRONICS CORP·Filed 2005·Granted Mar 6, 2007·10 cites·15 claims
- 1982US10333398B2Charging apparatusHITACHI AUTOMOTIVE SYSTEMS LTD·Filed 2016·Granted Jun 25, 2019·4 cites·8 claims
- 2082US8198834B2LED drive circuitMARUYAMA YASUHIRO·Filed 2009·Granted Jun 12, 2012·9 cites·29 claims
- 2182US7410305B2Optical semiconductor device, optical communication device, and electronic equipmentSHARP KK·Filed 2005·Granted Aug 12, 2008·11 cites·16 claims
- 2281US12273759B2Communication system, base station and communication terminal deviceMITSUBISHI ELECTRIC CORP·Filed 2023·Granted Apr 8, 2025·0 cites·3 claims
- 2381US8643301B2LED driver circuit and LED lighting device using the sameKANAMORI ATSUSHI·Filed 2011·Granted Feb 4, 2014·6 cites·16 claims
- 2481US8378646B2Bidirectional dc-dc converter and control method thereofHITACHI COMP PERIPHERALS CO·Filed 2009·Granted Feb 19, 2013·13 cites·17 claims
- 2581US7425727B2Optical semiconductor device, method for fabricating the same, lead frame and electronic equipmentSHARP KK·Filed 2005·Granted Sep 16, 2008·11 cites·10 claims
- 2679US5977725AResonance type power converter unit, lighting apparatus for illumination using the same and method for control of the converter unit and lighting apparatusHITACHI LTD·Filed 1997·Granted Nov 2, 1999·56 cites·20 claims
- 2779US2025203438A1Communication system, base station and user apparatusMITSUBISHI ELECTRIC CORP·Filed 2025·Application pending·0 cites
- 2878US6570343B1Device for turning on light and illumination apparatusHITACHI LTD·Filed 2000·Granted May 27, 2003·19 cites·4 claims
- 2977US8614568B2Gate drive circuit of the voltage drive type semiconductor element and power converterURUNO JUNPEI·Filed 2011·Granted Dec 24, 2013·6 cites·17 claims
- 3076US10541549B2Power supply apparatusHITACHI AUTOMOTIVE SYSTEMS LTD·Filed 2016·Granted Jan 21, 2020·3 cites·16 claims
- 3176US7557546B2Unidirectional DC-DC converterHITACHI LTD·Filed 2007·Granted Jul 7, 2009·13 cites·3 claims
- 3274US7268611B2Semiconductor device and memory card using sameRENESAS TECH CORP·Filed 2003·Granted Sep 11, 2007·19 cites·35 claims
- 3371US8810135B2LED drive circuit, LED illumination component, LED illumination device, and LED illumination systemMARUYAMA YASUHIRO·Filed 2012·Granted Aug 19, 2014·2 cites·5 claims
- 3470US7683597B2PWM signal generating circuit and power supply apparatus comprising such PWM signal generating circuitHITACHI COMP PERIPHERALS CO·Filed 2007·Granted Mar 23, 2010·6 cites·21 claims
- 3570US2021160725A1Communication systemMITSUBISHI ELECTRIC CORP·Filed 2021·Application pending·0 cites
- 3669US6734641B2Device for turning on light and illumination apparatusHITACHI LTD·Filed 2003·Granted May 11, 2004·11 cites·11 claims
- 3768US9025345B2Power supply apparatusSHIMADA TAKAE·Filed 2012·Granted May 5, 2015·3 cites·8 claims
- 3865US6124680ALighting device for illumination and lamp provided with the sameHITACHI LTD·Filed 1998·Granted Sep 26, 2000·23 cites·20 claims
- 3964US8203322B2DC-DC converterOKUBO TOSHIKAZU·Filed 2009·Granted Jun 19, 2012·7 cites·20 claims
- 4064US2024047116A1Printed Board Coil, High Frequency Transformer, and Electromagnetic Induction HeaterHITACHI LTD·Filed 2023·Application pending·0 cites
- 4162US8203855B2Complex inductor and power supply unitSHIMADA TAKAE·Filed 2008·Granted Jun 19, 2012·6 cites·6 claims
- 4262US6270712B1Molding die and marking method for semiconductor devicesSHARP KK·Filed 1999·Granted Aug 7, 2001·29 cites·17 claims
- 4359US7004325B2Resin-molded package with cavity structureNEC COMPOUND SEMICONDUCTOR·Filed 2002·Granted Feb 28, 2006·7 cites·30 claims
- 4458US7009166B2Photocoupler, method for producing the same, and electronic device equipped with the photocouplerSHARP KK·Filed 2003·Granted Mar 7, 2006·8 cites·11 claims
- 4556US7808086B2Lead frame and manufacturing method thereof, and semiconductor apparatus and manufacturing method thereofNEC ELECTRONICS CORP·Filed 2008·Granted Oct 5, 2010·2 cites·7 claims
- 4656US6222327B1Lighting device for illumination and lamp provided with the sameHITACHI LTD·Filed 2000·Granted Apr 24, 2001·11 cites·5 claims
- 4751US11152870B2Power conversion deviceHITACHI INDUSTRIAL PRODUCTS LTD·Filed 2018·Granted Oct 19, 2021·0 cites·8 claims
- 4851US7358535B2Photo-coupler semiconductor device and production method thereforSHARP KK·Filed 2003·Granted Apr 15, 2008·5 cites·9 claims
- 4951US2008100273A1DC-DC Converter and Its Controlling MethodURUNO JUNPEI·Filed 2007·Application pending·0 cites
- 5050US2014092639A1Bidirectional dc-dc converter and control method thereofHITACHI INFO & TELECOMM ENG·Filed 2013·Application pending·0 cites
Showing the top 50 of 59 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →