Inventor · disambiguated record
Keiji Okinaka
Also filed as: OKINAKA KEIJI
49 granted patents·9 pending applications·434 citations·filing 2000–2024
98Inventor score
Top patents by PatentIndex Score
58 records- 0198US7709104B2Aminoanthryl derivative-substituted pyrene compound and organic light-emitting deviceCANON KK·Filed 2005·Granted May 4, 2010·45 cites·4 claims
- 0298US7358409B2Substituted anthryl derivative and electroluminescence device using the sameCANON KK·Filed 2006·Granted Apr 15, 2008·41 cites·4 claims
- 0396US12077500B2Compound, material for organic electroluminescent elements, organic electroluminescent element, and electronic deviceIDEMITSU KOSAN CO·Filed 2023·Granted Sep 3, 2024·1 cites·20 claims
- 0496US7375250B2Aminoanthryl derivative substitution compound and organic electroluminescence device using the sameCANON KK·Filed 2004·Granted May 20, 2008·47 cites·9 claims
- 0595US11739061B2Compound, material for organic electroluminescent elements, organic electroluminescent element, and electronic deviceIDEMITSU KOSAN CO·Filed 2021·Granted Aug 29, 2023·2 cites·15 claims
- 0694US7982213B2Phenanthroline compound and organic light emitting device using sameCANON KK·Filed 2009·Granted Jul 19, 2011·13 cites·7 claims
- 0793US10590080B2Compound, material for organic electroluminescent elements, organic electroluminescent element, and electronic deviceIDEMITSU KOSAN CO·Filed 2014·Granted Mar 17, 2020·6 cites·67 claims
- 0893US8691398B24-aminofluorene compound and organic light emitting deviceYAMADA NAOKI·Filed 2006·Granted Apr 8, 2014·15 cites·14 claims
- 0992US7173131B2Anthryl derivative group substituted compound, and organic luminescent device making use of sameCANON KK·Filed 2004·Granted Feb 6, 2007·56 cites·3 claims
- 1089US7491450B2Organic electroluminescent deviceCANON KK·Filed 2004·Granted Feb 17, 2009·48 cites·3 claims
- 1189US2024400514A1Compound, material for organic electroluminescent elements, organic electroluminescent element, and electronic deviceIDEMITSU KOSAN CO·Filed 2024·Application pending·0 cites
- 1288US7129386B2Substituted anthryl derivative and electroluminescence device using the sameCANON KK·Filed 2004·Granted Oct 31, 2006·17 cites·1 claims
- 1387US8354788B2Organic light emitting deviceCANON KK·Filed 2009·Granted Jan 15, 2013·10 cites·14 claims
- 1487US8102116B2Organic light-emitting deviceKAMATANI JUN·Filed 2009·Granted Jan 24, 2012·10 cites·6 claims
- 1587US7691492B2Fluorene compound and organic light-emitting device using sameCANON KK·Filed 2005·Granted Apr 6, 2010·13 cites·5 claims
- 1685US7998597B2Organic light emitting deviceCANON KK·Filed 2007·Granted Aug 16, 2011·11 cites·6 claims
- 1784US8519613B2Organic light-emitting deviceKAMATANI JUN·Filed 2011·Granted Aug 27, 2013·4 cites·32 claims
- 1883US7466074B2Organic light-emitting deviceCANON KK·Filed 2006·Granted Dec 16, 2008·7 cites·5 claims
- 1978US7960041B2Fused ring aromatic compound and organic light-emitting device using sameCANON KK·Filed 2008·Granted Jun 14, 2011·2 cites·5 claims
- 2075US7604873B2Organic light emitting deviceCANON KK·Filed 2005·Granted Oct 20, 2009·10 cites·3 claims
- 2174US11059781B2Compound, material for organic electroluminescent elements, organic electroluminescent element, and electronic deviceIDEMITSU KOSAN CO·Filed 2020·Granted Jul 13, 2021·0 cites·29 claims
- 2274US8072136B2Compound and organic light emitting device using the compoundIGAWA SATOSHI·Filed 2007·Granted Dec 6, 2011·4 cites·15 claims
- 2374US7932592B2Compound and organic light-emitting elementCANON KK·Filed 2007·Granted Apr 26, 2011·4 cites·5 claims
- 2473US8318395B2Dibenzoanthracene compound and organic light emitting device having the sameSAITOH AKIHITO·Filed 2007·Granted Nov 27, 2012·4 cites·4 claims
- 2573US7034454B2Organic light emitting device with reverse intersystem crossing light emitting moleculesCANON KK·Filed 2003·Granted Apr 25, 2006·17 cites·7 claims
- 2672US10851055B2Compound, material for organic electroluminescent elements, organic electroluminescent element, and electronic deviceIDEMITSU KOSAN CO·Filed 2020·Granted Dec 1, 2020·0 cites·30 claims
- 2772US9331296B2Organic light-emitting deviceOKAJIMA MAKI·Filed 2011·Granted May 3, 2016·3 cites·6 claims
- 2872US8026664B2Compound and organic light emitting deviceCANON KK·Filed 2007·Granted Sep 27, 2011·4 cites·2 claims
- 2969US8227094B2Organic electroluminescent deviceOKINAKA KEIJI·Filed 2008·Granted Jul 24, 2012·2 cites·12 claims
- 3069US7355339B2Organic electroluminescent display and apparatus including organic electroluminescent displayCANON KK·Filed 2003·Granted Apr 8, 2008·13 cites·10 claims
- 3168US7785719B2Fluorene compound and organic light-emitting deviceCANON KK·Filed 2005·Granted Aug 31, 2010·2 cites·1 claims
- 3264US7550594B2Phenanthroline compound and organic light emitting device using sameCANON KK·Filed 2003·Granted Jun 23, 2009·6 cites·4 claims
- 3363US8084147B2Organic light-emitting deviceIGAWA SATOSHI·Filed 2008·Granted Dec 27, 2011·1 cites·7 claims
- 3463US7952269B2Organic light-emitting deviceCANON KK·Filed 2005·Granted May 31, 2011·1 cites·1 claims
- 3561US7919199B2Organic light emitting deviceCANON KK·Filed 2009·Granted Apr 5, 2011·4 cites·4 claims
- 3660US6985259B2Threshold matrix, and method and apparatus of reproducing gray levels using threshold matrixCANON KK·Filed 2001·Granted Jan 10, 2006·4 cites·25 claims
- 3759US9312494B2Organic light emitting deviceNAKASU MINAKO·Filed 2010·Granted Apr 12, 2016·1 cites·9 claims
- 3859US8384286B2Compound and organic light emitting device using the compoundCANON KK·Filed 2011·Granted Feb 26, 2013·0 cites·8 claims
- 3958US8404363B2Organic light emitting deviceOKINAKA KEIJI·Filed 2010·Granted Mar 26, 2013·2 cites·3 claims
- 4057US7309533B2Substituted anthryl derivative and electroluminescence device using the sameCANON KK·Filed 2006·Granted Dec 18, 2007·4 cites·4 claims
- 4154US9705087B2Organic light emitting deviceCANON KK·Filed 2016·Granted Jul 11, 2017·0 cites·9 claims
- 4252US8808875B2Compound and organic EL deviceKAMATANI JUN·Filed 2007·Granted Aug 19, 2014·0 cites·10 claims
- 4352US8288017B2Fused ring aromatic compound and organic light-emitting device using sameIGAWA SATOSHI·Filed 2011·Granted Oct 16, 2012·0 cites·7 claims
- 4451US2012056172A1Organic light-emitting deviceIGAWA SATOSHI·Filed 2011·Application pending·0 cites
- 4550US12364160B2Organic electroluminescent element and electronic deviceIDEMITSU KOSAN CO·Filed 2014·Granted Jul 15, 2025·0 cites·30 claims
- 4649US11730052B2Light-emitting deviceIDEMITSU KOSAN CO·Filed 2014·Granted Aug 15, 2023·0 cites·31 claims
- 4748US12200961B2Organic electroluminescence element, display device, and electronic apparatusIDEMITSU KOSAN CO·Filed 2019·Granted Jan 14, 2025·0 cites·13 claims
- 4847US12486452B2Organic electroluminescent element and electronic deviceIDEMITSU KOSAN CO·Filed 2020·Granted Dec 2, 2025·0 cites·31 claims
- 4947US2022263030A1Organic electroluminescent element and electronic deviceIDEMITSU KOSAN CO·Filed 2020·Application pending·0 cites
- 5046US2007029539A1Light-emitting element array and display apparatusCANON KK·Filed 2006·Application pending·0 cites
Showing the top 50 of 58 patent records by PatentIndex Score.
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