Inventor · disambiguated record
Yoshio Okamoto
Also filed as: NISHIKAWA KAZUTOSHI · OKAMOTO YOSHIO
135 granted patents·30 pending applications·1,811 citations·filing 1977–2025
99Inventor score
Files withHITACHI LTD43DAICEL CHEM36OKAMOTO YOSHIO12HITACHI AUTOMOTIVE SYSTEMS LTD11FUJITSU TAKAMISAWA COMPONENT7
Top patents by PatentIndex Score
165 records- 0197US5992391AElectromagnetic fuel injector and control method thereofHITACHI LTD·Filed 1998·Granted Nov 30, 1999·78 cites·22 claims
- 0294US6345601B1Direct injection fuel injector and internal combustion engine mounting the sameHITACHI LTD·Filed 2000·Granted Feb 12, 2002·42 cites·8 claims
- 0393US6550458B2Electromagnetic fuel injection apparatus, an internal combustion engine having an electromagnetic fuel injection apparatus, and a drive circuit of an electromagnetic fuel injection apparatusHITACHI LTD·Filed 2001·Granted Apr 22, 2003·47 cites·8 claims
- 0492US6571773B1Fuel injector and internal combustion engineHITACHI LTD·Filed 2000·Granted Jun 3, 2003·50 cites·15 claims
- 0592US6543412B2Intake air control device and internal combustion engine mounting the sameHITACHI LTD·Filed 2001·Granted Apr 8, 2003·72 cites·5 claims
- 0692US6474572B1Fuel-injection valveHITACHI LTD·Filed 2000·Granted Nov 5, 2002·33 cites·6 claims
- 0790US8882003B2Fuel injectorOKAMOTO YOSHIO·Filed 2012·Granted Nov 11, 2014·8 cites·7 claims
- 0890US4478953APolymerization process of optically active polymer and catalyst thereforDAICEL CHEM·Filed 1983·Granted Oct 23, 1984·43 cites·8 claims
- 0989US6878303B2Substrate processing apparatus and substrate processing methodDAINIPPON SCREEN MFG·Filed 2003·Granted Apr 12, 2005·40 cites·20 claims
- 1089US4887769AElectromagnetic fuel injection valveHITACHI LTD·Filed 1988·Granted Dec 19, 1989·33 cites·5 claims
- 1188US7591922B2Substrate processing apparatus and substrate processing methodDAINIPPON SCREEN MFG·Filed 2005·Granted Sep 22, 2009·12 cites·11 claims
- 1287US7334563B2Fuel injector and in-cylinder direct-injection gasoline engineHITACHI LTD·Filed 2006·Granted Feb 26, 2008·16 cites·12 claims
- 1387US4818394ASeparating agentDAICEL CHEM·Filed 1988·Granted Apr 4, 1989·48 cites·20 claims
- 1487US4619970ASeparation agentDAICEL CHEM·Filed 1985·Granted Oct 28, 1986·38 cites·19 claims
- 1585US6929196B2Fuel injection valve and internal combustion engine mounting the sameHITACHI CAR ENG CO LTD·Filed 2003·Granted Aug 16, 2005·24 cites·9 claims
- 1685US4861872AAlkyl-phenylcarbamate derivative of polysaccharideDAICEL CHEM·Filed 1988·Granted Aug 29, 1989·44 cites·17 claims
- 1784US5915352AIn-cylinder fuel injection device and internal combustion engine mounting the sameHITACHI LTD·Filed 1997·Granted Jun 29, 1999·43 cites·12 claims
- 1883US9157403B2Fuel injection valveSAITO TAKAHIRO·Filed 2012·Granted Oct 13, 2015·5 cites·21 claims
- 1983US6453872B1Fuel injection valve and internal combustion engine mounting the sameHITACHI LTD·Filed 2000·Granted Sep 24, 2002·20 cites·65 claims
- 2082US8888021B2Fuel injectorYASUKAWA YOSHIHITO·Filed 2012·Granted Nov 18, 2014·4 cites·9 claims
- 2181US6489868B1Electromagnetic relayFUJITSU TAKAMISAWA COMPONENT·Filed 2000·Granted Dec 3, 2002·18 cites·4 claims
- 2281US5108037AFuel injection valveHITACHI LTD·Filed 1990·Granted Apr 28, 1992·39 cites·21 claims
- 2380US7745616B2Bead for enantiomeric isomer resolution and process for producing the sameUNIV NAGOYA NAT UNIV CORP·Filed 2006·Granted Jun 29, 2010·3 cites·6 claims
- 2480US6588399B2Fuel injection method of internal combustion engine and fuel injection apparatus of internal combustion engineHITACHI LTD·Filed 2001·Granted Jul 8, 2003·19 cites·16 claims
- 2579US9593202B2Polycarbonate resin composition pellets and process for manufacturing sameIDEMITSU KOSAN CO·Filed 2012·Granted Mar 14, 2017·2 cites·11 claims
- 2679US6675766B2Fuel injection valve and internal combustion engine mounting the sameHITACHI LTD·Filed 2002·Granted Jan 13, 2004·13 cites·7 claims
- 2779US6543419B2Fuel injection system for internal combustion engineHITACHI LDT·Filed 2001·Granted Apr 8, 2003·22 cites·16 claims
- 2879US6414576B1Multiple electromagnetic relayFUJITSU TAKAMISAWA COMPONENT·Filed 2000·Granted Jul 2, 2002·22 cites·11 claims
- 2979US4912205AAlkyl-substituted phenylcarbamate derivative of polysaccharideDAICEL CHEM·Filed 1987·Granted Mar 27, 1990·25 cites·9 claims
- 3078US9901902B1Amylose derivative and optical isomer separating agent containing sameDAICEL CORP·Filed 2017·Granted Feb 27, 2018·1 cites·5 claims
- 3178US9309853B2Fuel injection valve and fuel injection systemHITACHI AUTOMOTIVE SYSTEMS LTD·Filed 2013·Granted Apr 12, 2016·3 cites·7 claims
- 3277US5202433APolysaccharide derivatives as separating agentsDAICEL CHEM·Filed 1990·Granted Apr 13, 1993·27 cites·8 claims
- 3377US4099988AComposite material having wear- and impact-resisting surface and process for producing sameKAWASAKI HEAVY IND LTD·Filed 1977·Granted Jul 11, 1978·13 cites·13 claims
- 3476US4165950AFan having forward-curved bladesHITACHI LTD·Filed 1977·Granted Aug 28, 1979·31 cites·6 claims
- 3576US2025320314A1Chitosan compounds and optical isomer separating agentDAICEL CORP·Filed 2025·Application pending·0 cites
- 3675US9927613B2Image display apparatus and head mounted displayHITACHI LG DATA STORAGE INC·Filed 2015·Granted Mar 27, 2018·2 cites·11 claims
- 3775US7387263B2Fuel injection valve of engine, fuel injection method and assembling method of the sameHITACHI LTD·Filed 2005·Granted Jun 17, 2008·7 cites·8 claims
- 3875US6641784B1Optically active isocyanurate and optical resolver comprising derivative of the sameNISSAN CHEMICAL IND LTD·Filed 2000·Granted Nov 4, 2003·6 cites·20 claims
- 3975US6129073AElectromagnetic fuel injector and control method thereofHITACHI LTD·Filed 1999·Granted Oct 10, 2000·21 cites·9 claims
- 4074US6508236B2Fuel supply device and internal combustion engine mounting the sameHITACHI LTD·Filed 2001·Granted Jan 21, 2003·15 cites·10 claims
- 4174US5234499ASpin coating apparatusDAINIPPON SCREEN MFG·Filed 1991·Granted Aug 10, 1993·61 cites·11 claims
- 4274US4546795ASolenoid valveHITACHI LTD·Filed 1984·Granted Oct 15, 1985·34 cites·11 claims
- 4373US7772382B2Chitosan derivative and method of producing sameUNIV NAGOYA NAT UNIV CORP·Filed 2006·Granted Aug 10, 2010·3 cites·5 claims
- 4472US6634338B1Fuel injection apparatus, fuel injection method and internal combustion engineHITACHI LTD·Filed 2000·Granted Oct 21, 2003·18 cites·12 claims
- 4572US6125818AFuel injector and internal combustion engine having the sameHIATCHI LTD·Filed 1998·Granted Oct 3, 2000·21 cites·20 claims
- 4672USRE34457ESeparating agentDAICEL CHEM·Filed 1992·Granted Nov 30, 1993·29 cites·21 claims
- 4771US6367720B1Electromagnetic fuel injection valveHITACHI LTD·Filed 2000·Granted Apr 9, 2002·12 cites·10 claims
- 4871US5109824AElectromagnetic fuel injection valveHITACHI LTD·Filed 1989·Granted May 5, 1992·23 cites·8 claims
- 4971US4995559AElectromagnetic fuel injection valveHITACHI LTD·Filed 1989·Granted Feb 26, 1991·16 cites·10 claims
- 5071US4613442ANovel optically active polymer, preparation and useDAICEL CHEM·Filed 1985·Granted Sep 23, 1986·15 cites·4 claims
Showing the top 50 of 165 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →