Inventor · disambiguated record
Koji Hirai
Also filed as: HIRAI KOJI · KIKUGA TOYOJI
61 granted patents·2 pending applications·917 citations·filing 1975–2022
99Inventor score
Top patents by PatentIndex Score
63 records- 0194US7606640B2Cooling apparatus and projection type display deviceSONY CORP·Filed 2005·Granted Oct 20, 2009·23 cites·10 claims
- 0293US11758643B2Printed circuit board and printing apparatusCANON KK·Filed 2022·Granted Sep 12, 2023·2 cites·15 claims
- 0392US8098259B2Image display deviceKONDO YOSHITAKE·Filed 2005·Granted Jan 17, 2012·26 cites·17 claims
- 0489US3971746ASynthetic polyisoprene rubber latexKURARAY CO·Filed 1975·Granted Jul 27, 1976·42 cites·27 claims
- 0588US5912193AThermoplastic polyurethanes and molded articles comprising themKURARAY CO·Filed 1998·Granted Jun 15, 1999·49 cites·3 claims
- 0688US5688890AThermoplastic polyurethane compositionKURARAY CO·Filed 1994·Granted Nov 18, 1997·44 cites·18 claims
- 0787US5555499ATraction control system for vehicleMAZDA MOTOR·Filed 1994·Granted Sep 10, 1996·68 cites·8 claims
- 0886US4639471AProcess for producing polyester polyurethaneKURARAY CO·Filed 1986·Granted Jan 27, 1987·36 cites·10 claims
- 0986US4551518AProcess for production of polyurethaneKURARAY CO·Filed 1984·Granted Nov 5, 1985·35 cites·5 claims
- 1084US5070172AProcess for producing polyurethaneKURARAY CO·Filed 1987·Granted Dec 3, 1991·31 cites·14 claims
- 1183US6603077B2Cable connection structure and electronic apparatus having the sameCANON KK·Filed 2001·Granted Aug 5, 2003·32 cites·6 claims
- 1280US6172881B1Method of interconnecting frame grounds in housing, and electronic equipment with structure interconnected by the methodCANON KK·Filed 1998·Granted Jan 9, 2001·44 cites·14 claims
- 1379US4823342ATime division exchange system having functions of compressing and expanding informationHITACHI LTD·Filed 1987·Granted Apr 18, 1989·51 cites·8 claims
- 1478US5290905APolyurethane, elastic polyurethane fiber and polyesterpolycarbonatediol used for the sameKURARAY CO·Filed 1991·Granted Mar 1, 1994·27 cites·13 claims
- 1577US6141618ATraction control system for vehiclesMAZDA MOTOR·Filed 1995·Granted Oct 31, 2000·29 cites·24 claims
- 1676US4367307APolyurethane composition having good light resistanceKURARAY CO·Filed 1981·Granted Jan 4, 1983·18 cites·7 claims
- 1775US6917007B2Metal dome sheet, its manufacturing method, and metal dome systemFUJIKURA LTD·Filed 2002·Granted Jul 12, 2005·22 cites·9 claims
- 1875US5077373APolyurethane, process for its production and polyester diol used for its productionKURARAY CO·Filed 1990·Granted Dec 31, 1991·24 cites·13 claims
- 1974USD496337SDiaphragm for a switchFUJIKURA LTD·Filed 2003·Granted Sep 21, 2004·19 cites·1 claims
- 2073US5310827APolyamide copolymersKURARAY CO·Filed 1991·Granted May 10, 1994·20 cites·8 claims
- 2171US5118780APolyester urethane fiber: polyester made from methyl pentane diolKURARAY CO·Filed 1990·Granted Jun 2, 1992·20 cites·10 claims
- 2270US5606005APolyurethane and molded article comprising the sameKURARAY CO·Filed 1995·Granted Feb 25, 1997·23 cites·5 claims
- 2369US11343903B2Printed circuit board and printing apparatusCANON KK·Filed 2020·Granted May 24, 2022·0 cites·15 claims
- 2467US4216299AColor developer for pressure-sensitive copying paperSUMITOMO DUREZ CO·Filed 1977·Granted Aug 5, 1980·12 cites·6 claims
- 2566US10766416B2Alarm system for vehicleMAZDA MOTOR·Filed 2019·Granted Sep 8, 2020·2 cites·4 claims
- 2665US4704445APolyurethane compositionsKURARAY CO·Filed 1986·Granted Nov 3, 1987·14 cites·17 claims
- 2764US8681031B2D/A converterHIRAI KOJI·Filed 2012·Granted Mar 25, 2014·2 cites·8 claims
- 2863US8144044B2D/A converter including higher-order resistor stringHIRAI KOJI·Filed 2010·Granted Mar 27, 2012·2 cites·11 claims
- 2963US6871053B2Wireless communication apparatusFUJITSU LTD·Filed 2001·Granted Mar 22, 2005·9 cites·20 claims
- 3062US8866658B2Digital-to-analog converterHIRAI KOJI·Filed 2012·Granted Oct 21, 2014·2 cites·9 claims
- 3162US8799939B2Video receiving apparatus and video receiving methodHIRAI KOJI·Filed 2007·Granted Aug 5, 2014·1 cites·7 claims
- 3262US8683422B2Support apparatus and information processing method thereofNOJIMA TOSHITAKA·Filed 2011·Granted Mar 25, 2014·3 cites·9 claims
- 3362US7374456B2Radiation noise minimizing shielding casingCANON KK·Filed 2007·Granted May 20, 2008·1 cites·6 claims
- 3462US4412022APolyurethane coating compositions prepared from a polymeric diol, an alicyclic diisocyanate, an alicyclic diamine and either hydrazine or isophthalic acid dihydrazideKURARAY CO·Filed 1982·Granted Oct 25, 1983·15 cites·7 claims
- 3560US8228223B2Resistor string digital-to-analog converterHIRAI KOJI·Filed 2010·Granted Jul 24, 2012·2 cites·7 claims
- 3660US4760221AMultiple contact switchTOKAI RIKA CO LTD·Filed 1987·Granted Jul 26, 1988·13 cites·6 claims
- 3759US4216300AColor developer for pressure-sensitive copying paperSUMITOMO DUREZ CO·Filed 1977·Granted Aug 5, 1980·11 cites·8 claims
- 3858US10863615B2Electronic apparatusCANON KK·Filed 2019·Granted Dec 8, 2020·0 cites·12 claims
- 3958US8963757B2D/A converter including higher-order resistor stringHIRAI KOJI·Filed 2012·Granted Feb 24, 2015·0 cites·12 claims
- 4058US4563737AVirtual storage managementHITACHI LTD·Filed 1982·Granted Jan 7, 1986·22 cites·5 claims
- 4157US10745031B2Alarm system for vehicleMAZDA MOTOR·Filed 2019·Granted Aug 18, 2020·0 cites·15 claims
- 4256US5821180ALaminate comprising a polyurethane layerKURARAY CO·Filed 1997·Granted Oct 13, 1998·22 cites·11 claims
- 4355US7205491B2Membrane for key switch and the key switchFUJIKURA LTD·Filed 2003·Granted Apr 17, 2007·7 cites·8 claims
- 4455US6153140AMethod and apparatus for molding an insulator deviceTOKAI RIKA CO LTD·Filed 1996·Granted Nov 28, 2000·17 cites·8 claims
- 4555US2011114103A1False luxury itemHIRAI KOJI·Filed 2009·Application pending·0 cites
- 4653US9143644B2Image forming apparatusCANON KK·Filed 2014·Granted Sep 22, 2015·0 cites·12 claims
- 4753US4115327APhenolic resin color developing compositions for copying papers and methods of preparationSUMITOMO DUREZ CO·Filed 1977·Granted Sep 19, 1978·10 cites·11 claims
- 4852US10433417B2Electronic apparatusCANON KK·Filed 2017·Granted Oct 1, 2019·0 cites·26 claims
- 4952US8411602B2Radio communication apparatusOKAWA SHIGERU·Filed 2008·Granted Apr 2, 2013·2 cites·4 claims
- 5052US7249973B2Radiation noise minimizing shielding casingCANON KK·Filed 2006·Granted Jul 31, 2007·0 cites·13 claims
Showing the top 50 of 63 patent records by PatentIndex Score.
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