Inventor · disambiguated record
Fumikazu Takahashi
Also filed as: TAKAHASHI FUMIKAZU
33 granted patents·9 pending applications·399 citations·filing 1992–2022
97Inventor score
Files withKAO CORP11HITACHI COMP PERIPHERALS CO9HITACHI INFORMATION & TELECOMMUNICATION ENG LTD5HITACHI LTD4TOSHIBA KK3
Top patents by PatentIndex Score
42 records- 0197US7495415B2DC backup power supply systemHITACHI LTD·Filed 2005·Granted Feb 24, 2009·50 cites·22 claims
- 0296US7589436B2Data processing unit and DC backup power supplyHITACHI COMP PERIPHERALS CO·Filed 2005·Granted Sep 15, 2009·30 cites·10 claims
- 0387US7840840B2DC backup power supply system, a disk array and a DC backup power supplyHITACHI COMP PERIPHERALS CO·Filed 2008·Granted Nov 23, 2010·25 cites·19 claims
- 0487US7432617B2Uninterruptible power systemHITACHI LTD·Filed 2006·Granted Oct 7, 2008·22 cites·20 claims
- 0583US8564992B2Power factor correction device and method with off time prediction for critical mode operationTAKAHASHI FUMIKAZU·Filed 2010·Granted Oct 22, 2013·9 cites·6 claims
- 0681US5311136AGradient power source apparatus for magnetic resonance imaging systemTOSHIBA KK·Filed 1992·Granted May 10, 1994·35 cites·18 claims
- 0780US5311134AMagnetic resonance imaging systemTOSHIBA KK·Filed 1992·Granted May 10, 1994·46 cites·19 claims
- 0879US8338361B2Fragrance compositionTAKAHASHI FUMIKAZU·Filed 2010·Granted Dec 25, 2012·4 cites·7 claims
- 0979US7923980B2Digital controlled power supplyHITACHI COMP PERIPHERALS CO·Filed 2008·Granted Apr 12, 2011·15 cites·9 claims
- 1077US7705562B2Switching power supply unit and disk array systemHITACHI COMP PERIPHERALS CO·Filed 2006·Granted Apr 27, 2010·15 cites·12 claims
- 1175US11312980B2Method for producing 3-hydroxy-4-aminobenzoic acid compoundKAO CORP·Filed 2019·Granted Apr 26, 2022·1 cites·13 claims
- 1275US7049711B2Uninterruptible power systemHITACHI COMP PERIPHERALS CO·Filed 2003·Granted May 23, 2006·24 cites·18 claims
- 1374US7406623B2DC backup power supply system and disk array using sameHITACHI COMP PERIPHERALS CO·Filed 2004·Granted Jul 29, 2008·27 cites·23 claims
- 1472US8486672B2Method of producing lauric acid or an ester thereofYOSHIDA HIROSHI·Filed 2011·Granted Jul 16, 2013·3 cites·2 claims
- 1571US11239784B2Motor drive device, controller, and electric vehicle systemHITACHI AUTOMOTIVE SYSTEMS LTD·Filed 2019·Granted Feb 1, 2022·1 cites·11 claims
- 1671US5430639APolyphase AC input to DC output voltage converterTOSHIBA KK·Filed 1994·Granted Jul 4, 1995·37 cites·19 claims
- 1770US7683597B2PWM 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
- 1870US7245469B2DC backup power supply device and method for diagnosing the sameHITACHI COMP PERIPHERALS CO·Filed 2003·Granted Jul 17, 2007·27 cites·5 claims
- 1969US9680303B2Power storage system and power source systemHITACHI INFORMATION & TELECOMMUNICATION ENG LTD·Filed 2013·Granted Jun 13, 2017·4 cites·13 claims
- 2068US9306472B2Power supply device operating switching elements of first and second switching legs to charge first and second capacitors to a voltage higher than a voltage crest value of an AC power supply and method of operating the power supply deviceHITACHI INFO & TELECOMM ENG·Filed 2014·Granted Apr 5, 2016·3 cites·11 claims
- 2168US7880440B2Switching power supplyHITACHI COMP PERIPHERALS CO·Filed 2008·Granted Feb 1, 2011·8 cites·5 claims
- 2263US10063058B2Power converterHITACHI INFORMATION & TELECOMMUNICATION ENG LTD·Filed 2017·Granted Aug 28, 2018·1 cites·9 claims
- 2362US2025051785A1Novel promoterKAO CORP·Filed 2022·Application pending·0 cites
- 2461US9991819B2Power conversion system and method for detecting isolated operation of the sameHITACHI INFORMATION & TELECOMMUNICATION ENG LTD·Filed 2014·Granted Jun 5, 2018·2 cites·9 claims
- 2559US2025019728A1Method for producing aromatic compoundKAO CORP·Filed 2022·Application pending·0 cites
- 2654US9225181B2Power storage system with constant current charge control or constant voltage charge control depending on battery terminal voltage in a charging processHITACHI INFO & TELECOMM ENG·Filed 2013·Granted Dec 29, 2015·1 cites·8 claims
- 2753US2005146223A1DC backup power supply systemFiled 2005·Application pending·0 cites
- 2851US11560061B2Motor drive device and electric vehicle systemHITACHI ASTEMO LTD·Filed 2019·Granted Jan 24, 2023·0 cites·11 claims
- 2951US10590442B2Method for producing C4 dicarboxylic acidKAO CORP·Filed 2017·Granted Mar 17, 2020·0 cites·20 claims
- 3051US9540672B2Method of producing glycolipidsKAO CORP·Filed 2013·Granted Jan 10, 2017·0 cites·18 claims
- 3150US10590428B2Sophorolipid highly-productive mutant strainKAO CORP·Filed 2016·Granted Mar 17, 2020·0 cites·7 claims
- 3249US2024110211A1Transformed cell having ability to produce 2,5-pyridine dicarboxylic acidKAO CORP·Filed 2020·Application pending·0 cites
- 3346US2003222618A1DC backup power supply systemFiled 2003·Application pending·0 cites
- 3445US9222111B2Method of producing lauric acid-containing oil or fatYOSHIDA HIROSHI·Filed 2011·Granted Dec 29, 2015·0 cites·15 claims
- 3543US6798255B2Semiconductor integrated circuit deviceHITACHI LTD·Filed 2001·Granted Sep 28, 2004·3 cites·22 claims
- 3642US2015125915A1Method for Producing Lactic AcidKAO CORP·Filed 2013·Application pending·0 cites
- 3742US2015303731A1Electric Energy Storage DeviceHITACHI LTD·Filed 2012·Application pending·0 cites
- 3841US10351862B2PromoterKAO CORP·Filed 2016·Granted Jul 16, 2019·0 cites·21 claims
- 3940US2011217743A1Method of Producing Lauric Acid-containing Oil or FatKAO CORP·Filed 2010·Application pending·0 cites
- 4038US10435684B2Sophorolipid highly-productive mutant strainKAO CORP·Filed 2016·Granted Oct 8, 2019·0 cites·21 claims
- 4138US2017155325A1Resonant power supply deviceHITACHI INFORMATION & TELECOMMUNICATION ENG LTD·Filed 2016·Application pending·0 cites
- 4235US9515557B2Step-up step-down converter deviceHITACHI INFORMATION & TELECOMMUNICATION ENG LTD·Filed 2015·Granted Dec 6, 2016·0 cites·3 claims
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