Inventor
OKINAKA KEIJI
JP49 patents
⚠️ This page may combine multiple inventors who share the name “OKINAKA KEIJI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
CANON KK
25 patentsUS7173131B2Feb 6, 2007
Anthryl derivative group substituted compound, and organic luminescent device making use of same
CANON KK56 citations96
US7709104B2May 4, 2010
Aminoanthryl derivative-substituted pyrene compound and organic light-emitting device
CANON KK45 citations93
US7491450B2Feb 17, 2009
Organic electroluminescent device
CANON KK48 citations93
US7375250B2May 20, 2008
Aminoanthryl derivative substitution compound and organic electroluminescence device using the same
CANON KK47 citations93
US7358409B2Apr 15, 2008
Substituted anthryl derivative and electroluminescence device using the same
CANON KK41 citations93
US7129386B2Oct 31, 2006
Substituted anthryl derivative and electroluminescence device using the same
CANON KK17 citations93
US7998597B2Aug 16, 2011
Organic light emitting device
CANON KK11 citations84
US7982213B2Jul 19, 2011
Phenanthroline compound and organic light emitting device using same
CANON KK13 citations84
US7691492B2Apr 6, 2010
Fluorene compound and organic light-emitting device using same
CANON KK13 citations84
US7604873B2Oct 20, 2009
Organic light emitting device
CANON KK10 citations84
US7355339B2Apr 8, 2008
Organic electroluminescent display and apparatus including organic electroluminescent display
CANON KK13 citations84
US7034454B2Apr 25, 2006
Organic light emitting device with reverse intersystem crossing light emitting molecules
CANON KK17 citations84
US8354788B2Jan 15, 2013
Organic light emitting device
CANON KK10 citations83
US7550594B2Jun 23, 2009
Phenanthroline compound and organic light emitting device using same
CANON KK6 citations74
US7466074B2Dec 16, 2008
Organic light-emitting device
CANON KK7 citations74
US8026664B2Sep 27, 2011
Compound and organic light emitting device
CANON KK4 citations63
US7960041B2Jun 14, 2011
Fused ring aromatic compound and organic light-emitting device using same
CANON KK2 citations63
US7932592B2Apr 26, 2011
Compound and organic light-emitting element
CANON KK4 citations63
US7919199B2Apr 5, 2011
Organic light emitting device
CANON KK4 citations63
US7785719B2Aug 31, 2010
Fluorene compound and organic light-emitting device
CANON KK2 citations63
US7309533B2Dec 18, 2007
Substituted anthryl derivative and electroluminescence device using the same
CANON KK4 citations63
US6985259B2Jan 10, 2006
Threshold matrix, and method and apparatus of reproducing gray levels using threshold matrix
CANON KK4 citations63
US7952269B2May 31, 2011
Organic light-emitting device
CANON KK1 citations52
US9705087B2Jul 11, 2017
Organic light emitting device
CANON KK0 citations51
US8384286B2Feb 26, 2013
Compound and organic light emitting device using the compound
CANON KK0 citations51
IDEMITSU KOSAN CO
11 patentsUS10590080B2Mar 17, 2020
Compound, material for organic electroluminescent elements, organic electroluminescent element, and electronic device
IDEMITSU KOSAN CO6 citations84
US12077500B2Sep 3, 2024
Compound, material for organic electroluminescent elements, organic electroluminescent element, and electronic device
IDEMITSU KOSAN CO1 citations73
US11739061B2Aug 29, 2023
Compound, material for organic electroluminescent elements, organic electroluminescent element, and electronic device
IDEMITSU KOSAN CO2 citations73
US11059781B2Jul 13, 2021
Compound, material for organic electroluminescent elements, organic electroluminescent element, and electronic device
IDEMITSU KOSAN CO0 citations62
US12364160B2Jul 15, 2025
Organic electroluminescent element and electronic device
IDEMITSU KOSAN CO0 citations52
US11730052B2Aug 15, 2023
Light-emitting device
IDEMITSU KOSAN CO0 citations52
US10851055B2Dec 1, 2020
Compound, material for organic electroluminescent elements, organic electroluminescent element, and electronic device
IDEMITSU KOSAN CO0 citations52
US12486452B2Dec 2, 2025
Organic electroluminescent element and electronic device
IDEMITSU KOSAN CO0 citations51
US12200961B2Jan 14, 2025
Organic electroluminescence element, display device, and electronic apparatus
IDEMITSU KOSAN CO0 citations51
US11944009B2Mar 26, 2024
Compound, material for organic electroluminescent element, organic electroluminescent element, and electronic device
IDEMITSU KOSAN CO0 citations48
US11482681B2Oct 25, 2022
Compound, material for organic electroluminescence element, organic electroluminescence element, and electronic device
IDEMITSU KOSAN CO0 citations48
IGAWA SATOSHI
4 patentsUS8072136B2Dec 6, 2011
Compound and organic light emitting device using the compound
IGAWA SATOSHI4 citations61
US8288017B2Oct 16, 2012
Fused ring aromatic compound and organic light-emitting device using same
IGAWA SATOSHI0 citations51
US8084147B2Dec 27, 2011
Organic light-emitting device
IGAWA SATOSHI1 citations51
US8318321B2Nov 27, 2012
Compound and organic light-emitting device
IGAWA SATOSHI0 citations40