Inventor · disambiguated record
Seiji Ishida
Also filed as: ISHIDA SEIJI
45 granted patents·6 pending applications·601 citations·filing 1989–2023
98Inventor score
Top patents by PatentIndex Score
51 records- 0197US10450723B2Hybrid construction machineryHITACHI CONSTRUCTION MACH CO·Filed 2016·Granted Oct 22, 2019·14 cites·3 claims
- 0296US7570085B2Gate driver circuit for switching deviceHITACHI LTD·Filed 2007·Granted Aug 4, 2009·37 cites·12 claims
- 0391US8924100B2Hybrid construction machineIMURA SHINYA·Filed 2011·Granted Dec 30, 2014·16 cites·7 claims
- 0490US6262294B1Process for continuously producing monomer components from aromatic polyesterAGENCY IND SCIENCE TECHN·Filed 2000·Granted Jul 17, 2001·60 cites·8 claims
- 0588US6173762B1Heat exchanger tube for falling film evaporatorKOBE STEEL LTD·Filed 1994·Granted Jan 16, 2001·64 cites·11 claims
- 0682US6704212B2PWM inverter with long carrier wave insertionHITACHI LTD·Filed 2002·Granted Mar 9, 2004·44 cites·22 claims
- 0778US5631819APower converterHITACHI LTD·Filed 1996·Granted May 20, 1997·41 cites·14 claims
- 0877US11149409B2Construction machineHITACHI CONSTRUCTION MACH CO·Filed 2017·Granted Oct 19, 2021·1 cites·3 claims
- 0977US9431879B2Generator motor and electric vehicle using sameKIKUCHI SATOSHI·Filed 2012·Granted Aug 30, 2016·4 cites·6 claims
- 1077US9399856B2Hydraulic working machineFUJISHIMA KAZUO·Filed 2012·Granted Jul 26, 2016·7 cites·9 claims
- 1175US6556464B2PWM converter systemHITACHI LTD·Filed 2001·Granted Apr 29, 2003·30 cites·11 claims
- 1274US11198352B2Electricity storage device controller, electric system and construction machineHITACHI CONSTRUCTION MACH CO·Filed 2018·Granted Dec 14, 2021·2 cites·10 claims
- 1374US6496397B2Inverter deviceHITACHI LTD·Filed 2001·Granted Dec 17, 2002·29 cites·5 claims
- 1473US6556460B2Method for controlling a vehicle provided with an electric power converterHITACHI LTD·Filed 2002·Granted Apr 29, 2003·22 cites·5 claims
- 1571US11053661B2Work machineHITACHI CONSTRUCTION MACH CO·Filed 2017·Granted Jul 6, 2021·2 cites·9 claims
- 1671US6642689B2Control apparatus for power converterHITACHI LTD·Filed 2001·Granted Nov 4, 2003·32 cites·20 claims
- 1769US12224650B2Drive system having an induction generator with a main winding and auxiliary windingHITACHI CONSTRUCTION MACH CO·Filed 2021·Granted Feb 11, 2025·0 cites·5 claims
- 1866US9421873B2Construction machineISHIDA SEIJI·Filed 2011·Granted Aug 23, 2016·5 cites·10 claims
- 1965US6657412B2Pulse width modulation method, pulse width modulator and power converterHITACHI LTD·Filed 2001·Granted Dec 2, 2003·11 cites·18 claims
- 2065US6611124B2Control apparatus of induction motorHITACHI LTD·Filed 2001·Granted Aug 26, 2003·14 cites·5 claims
- 2165US5590711AHeat transfer tube for absorberKOBE STEEL LTD·Filed 1994·Granted Jan 7, 1997·27 cites·1 claims
- 2265US5574352AFrequency control method for inverter and apparatus thereforHITACHI LTD·Filed 1994·Granted Nov 12, 1996·23 cites·14 claims
- 2362US12460380B2Electric work machineHITACHI CONSTRUCTION MACH CO·Filed 2023·Granted Nov 4, 2025·0 cites·3 claims
- 2462US12191789B2Drive systemHITACHI CONSTRUCTION MACH CO·Filed 2022·Granted Jan 7, 2025·0 cites·7 claims
- 2562US6147470ADevice for controlling induction motor and method of controlling the sameHITACHI LTD·Filed 1996·Granted Nov 14, 2000·22 cites·9 claims
- 2662US5095878AAir/fuel ratio control system for internal combustion engineMITSUBISHI MOTORS CORP·Filed 1990·Granted Mar 17, 1992·20 cites·11 claims
- 2761US9065361B2Hybrid construction machineISHIHARA SHINJI·Filed 2011·Granted Jun 23, 2015·3 cites·6 claims
- 2861US8950180B2Hybrid construction machineOOKI TAKATOSHI·Filed 2012·Granted Feb 10, 2015·3 cites·9 claims
- 2960US12319155B2Drive system for dump truckHITACHI CONSTRUCTION MACH CO·Filed 2022·Granted Jun 3, 2025·0 cites·3 claims
- 3060US10150465B2Hybrid construction machineHITACHI CONSTRUCTION MACH CO·Filed 2015·Granted Dec 11, 2018·1 cites·7 claims
- 3160US9108645B2Driving system for railroad vehicleSHIMADA MOTOMI·Filed 2009·Granted Aug 18, 2015·3 cites·2 claims
- 3257US6058036AInverter apparatus having operation specifications determined by type of I/O block which is connected to basic control unitHITACHI LTD·Filed 1997·Granted May 2, 2000·27 cites·12 claims
- 3357US2025326301A1Drive System for Dump TruckHITACHI CONSTRUCTION MACH CO·Filed 2022·Application pending·0 cites
- 3454US10060095B2Hybrid work machineHITACHI CONSTRUCTION MACH CO·Filed 2015·Granted Aug 28, 2018·1 cites·5 claims
- 3554US7920395B2Pulse width modulation method for a power converterHITACHI LTD·Filed 2008·Granted Apr 5, 2011·3 cites·2 claims
- 3651US9617715B2Construction machineHITACHI CONSTRUCTION MACH CO·Filed 2016·Granted Apr 11, 2017·0 cites·7 claims
- 3749US11964569B2Construction machineHITACHI CONSTRUCTION MACH CO·Filed 2019·Granted Apr 23, 2024·0 cites·3 claims
- 3845US10047501B2Control device of construction machineHITACHI CONSTRUCTION MACH CO·Filed 2016·Granted Aug 14, 2018·0 cites·8 claims
- 3942US9020707B2Construction machine having swing bodyIMURA SHINYA·Filed 2011·Granted Apr 28, 2015·0 cites·8 claims
- 4042US2014188321A1Construction machineISHIDA SEIJI·Filed 2012·Application pending·0 cites
- 4140US5300872AMethod and apparatus for control of inverterHITACHI LTD·Filed 1992·Granted Apr 5, 1994·11 cites·24 claims
- 4239US2021404146A1Construction MachineHITACHI CONSTRUCTION MACH CO·Filed 2018·Application pending·0 cites
- 4339US2005202741A1Woven or knit fabric and process for producing the sameTOYO BOSEKI·Filed 2003·Application pending·0 cites
- 4438US7433403B2Pulse width modulation method for a power converterHITACHI LTD·Filed 2003·Granted Oct 7, 2008·2 cites·3 claims
- 4538US5077971AAir/fuel ratio control system for an internal combustion engineMITSUBISHI MOTORS CORP·Filed 1990·Granted Jan 7, 1992·8 cites·13 claims
- 4635US11220803B2Construction machineHITACHI CONSTRUCTION MACH CO·Filed 2017·Granted Jan 11, 2022·0 cites·2 claims
- 4735US5000843ACulture fluid concentratorSNOW BRAND MILK PRODUCTS CO LTD·Filed 1989·Granted Mar 19, 1991·3 cites·7 claims
- 4834US2017291501A1Hybrid Construction MachineryHITACHI CONSTRUCTION MACH CO·Filed 2015·Application pending·0 cites
- 4933US2014147238A1Construction machineSASAKI MASATAKA·Filed 2011·Application pending·0 cites
- 5031US5445682AMethod of applying surface hydrophilic treatment to heat-transfer tubeKOBE STEEL LTD·Filed 1994·Granted Aug 29, 1995·9 cites·2 claims
Showing the top 50 of 51 patent records by PatentIndex Score.
Join the waitlist — get patent alerts
Get an alert when Seiji Ishida files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →