Inventor
FUJIYAMA TAKAHIRO
JP38 patents
⚠️ This page may combine multiple inventors who share the name “FUJIYAMA TAKAHIRO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
IDEMITSU KOSAN CO
16 patentsUS10014477B2Jul 3, 2018
Aromatic amine derivative, and organic electroluminescent element using same
IDEMITSU KOSAN CO8 citations84
US9196842B2Nov 24, 2015
Aromatic amine derivative and organic electroluminescent element
IDEMITSU KOSAN CO9 citations84
US10854822B2Dec 1, 2020
Compound, material for organic electroluminescent element, organic electroluminescent element, and electronic device
IDEMITSU KOSAN CO2 citations73
US10756275B2Aug 25, 2020
Compound, material for organic electroluminescence devices, organic electroluminescence device, and electronic equipment
IDEMITSU KOSAN CO2 citations73
US10516112B2Dec 24, 2019
Compound, organic electroluminescent element material, organic electroluminescent element, and electronic device
IDEMITSU KOSAN CO3 citations73
US10411192B2Sep 10, 2019
Aromatic amine compound, organic electroluminescent element and electronic device
IDEMITSU KOSAN CO2 citations73
US9882134B2Jan 30, 2018
Polymer compound, material for organic electroluminescence element using same, and organic electroluminescence element
IDEMITSU KOSAN CO3 citations73
US10944057B2Mar 9, 2021
Compound, material for organic electroluminescence devices, organic electroluminescence device, and electronic equipment
IDEMITSU KOSAN CO0 citations63
US12274162B2Apr 8, 2025
Compound, material for organic electroluminescent element, organic electroluminescent element, and electronic apparatus
IDEMITSU KOSAN CO0 citations62
US12063851B2Aug 13, 2024
Nitrogenated aromatic heterocyclic derivative and organic electroluminescent element using same
IDEMITSU KOSAN CO0 citations62
US11616200B2Mar 28, 2023
Compound, material for organic electroluminescent element, organic electroluminescent element, and electronic apparatus
IDEMITSU KOSAN CO0 citations62
US11444246B2Sep 13, 2022
Aromatic amine derivative, and organic electroluminescent element using same
IDEMITSU KOSAN CO0 citations62
US11362279B2Jun 14, 2022
Aromatic amine derivative, and organic electroluminescent element using same
IDEMITSU KOSAN CO0 citations62
US10985325B2Apr 20, 2021
Aromatic amine derivative, and organic electroluminescent element using same
IDEMITSU KOSAN CO1 citations62
US9966539B2May 8, 2018
Organic electroluminescence device
IDEMITSU KOSAN CO1 citations52
US9871203B2Jan 16, 2018
Aromatic amine derivative, organic electroluminescent element and electronic device
IDEMITSU KOSAN CO0 citations42
SAMSUNG ELECTRONICS CO LTD
11 patentsUS12466947B2Nov 11, 2025
Copolymer, electroluminescence device material including copolymer, and electroluminescence device
SAMSUNG ELECTRONICS CO LTD0 citations61
US11939422B2Mar 26, 2024
Copolymer, electroluminescence device material including copolymer, and electroluminescence device
SAMSUNG ELECTRONICS CO LTD0 citations61
US11910697B2Feb 20, 2024
Copolymer, electroluminescence device material including copolymer, and electroluminescence device
SAMSUNG ELECTRONICS CO LTD1 citations61
US11997917B2May 28, 2024
Quantum dot electroluminescence device
SAMSUNG ELECTRONICS CO LTD0 citations60
US11631815B2Apr 18, 2023
Quantum dot electroluminescence device
SAMSUNG ELECTRONICS CO LTD0 citations60
US11411188B2Aug 9, 2022
Arylamine polymer including silicone, and electroluminescence device material and electroluminescence device using the polymer
SAMSUNG ELECTRONICS CO LTD0 citations60
US11917899B2Feb 27, 2024
Arylamine-fluorene alternating copolymer, electroluminescence device material, and electroluminescence device using the polymer
SAMSUNG ELECTRONICS CO LTD0 citations51
US12384965B2Aug 12, 2025
Copolymer, electroluminescent device material including copolymer, and electroluminescent device
SAMSUNG ELECTRONICS CO LTD0 citations50
US12173114B2Dec 24, 2024
Copolymer, electroluminescence device material including copolymer, and electroluminescence device
SAMSUNG ELECTRONICS CO LTD0 citations50
US11974494B2Apr 30, 2024
Polymer compound, composition including the polymer compound, light-emitting device including the polymer compound
SAMSUNG ELECTRONICS CO LTD0 citations50
US11758800B2Sep 12, 2023
Polymer material, material for electroluminescence device, liquid composition, thin film, and electroluminescence device
SAMSUNG ELECTRONICS CO LTD0 citations50
MITSUI CHEMICALS INC
4 patentsUS6245257B1Jun 12, 2001
Liquid crystal compositions
MITSUI CHEMICALS INC24 citations91
US7763727B2Jul 27, 2010
Compound and organic electronic device using the same
MITSUI CHEMICALS INC8 citations82
US6007737ADec 28, 1999
Liquid crystal compositions
MITSUI CHEMICALS INC6 citations55
US6117359ASep 12, 2000
Tetralin compound, liquid crystal material and liquid crystal composition
MITSUI CHEMICALS INC0 citations49
KATO TOMOKI
4 patentsUS9564595B2Feb 7, 2017
Bis-carbazole derivative and organic electroluminescent element using same
KATO TOMOKI8 citations84
US9634255B2Apr 25, 2017
Aromatic amine derivative and organic electroluminescence element using same
KATO TOMOKI5 citations73
US9184395B2Nov 10, 2015
Aromatic amine derivative and organic electroluminescent element using same
KATO TOMOKI4 citations73
US10043977B2Aug 7, 2018
Nitrogenated aromatic heterocyclic derivative, and organic electroluminescent element using same
KATO TOMOKI1 citations52