Inventor
ITO HIROKATSU
JP72 patents
⚠️ This page may combine multiple inventors who share the name “ITO HIROKATSU”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
IDEMITSU KOSAN CO
41 patentsUS10435350B2Oct 8, 2019
Organic electroluminecence device
IDEMITSU KOSAN CO128 citations99
US10109803B1Oct 23, 2018
Organic electroluminescence device and electronic device
IDEMITSU KOSAN CO4 citations84
US10103338B1Oct 16, 2018
Organic electroluminescence device and electronic device
IDEMITSU KOSAN CO7 citations84
US11548877B2Jan 10, 2023
Compound, material for organic electroluminescence device, organic electroluminescence device, and electronic device
IDEMITSU KOSAN CO2 citations73
US11117857B2Sep 14, 2021
Compound, material for organic electroluminescent elements, organic electroluminescent element and electronic device
IDEMITSU KOSAN CO3 citations73
US10270040B2Apr 23, 2019
Oxygen-containing fused ring amine compound, sulfur-containing fused ring amine compound and organic electroluminescence device
IDEMITSU KOSAN CO2 citations73
US10109804B1Oct 23, 2018
Organic electroluminescence device and electronic device
IDEMITSU KOSAN CO2 citations73
US10056558B2Aug 21, 2018
Aromatic amine derivative, material for organic electroluminescent element, and organic electroluminescent element
IDEMITSU KOSAN CO4 citations73
US9991445B2Jun 5, 2018
Heterocyclic compound, material for organic electroluminescence device including the same, and organic electroluminescence device and electronic equipment employing the same
IDEMITSU KOSAN CO2 citations73
US9963429B2May 8, 2018
Carbazole derivative, material for organic electroluminescent element which comprises same, and organic electroluminescent element and electronic device each manufactured using same
IDEMITSU KOSAN CO2 citations73
US9947879B2Apr 17, 2018
Anthracene derivative and organic electroluminescence element using same
IDEMITSU KOSAN CO2 citations73
US9902687B2Feb 27, 2018
Compound
IDEMITSU KOSAN CO2 citations73
US9818953B2Nov 14, 2017
Aromatic amine derivative, material for organic electroluminescent element, and organic electroluminescent element
IDEMITSU KOSAN CO4 citations73
US9748492B2Aug 29, 2017
Organic electroluminescent device
IDEMITSU KOSAN CO3 citations73
US9312500B2Apr 12, 2016
Organic electroluminescence device
IDEMITSU KOSAN CO3 citations73
US10424740B2Sep 24, 2019
Compound, material for organic electroluminescence devices, organic electroluminescence device, and electronic device
IDEMITSU KOSAN CO2 citations72
US9748494B2Aug 29, 2017
Compound, material for organic electroluminescence element, organic electroluminescence element, and electronic apparatus
IDEMITSU KOSAN CO2 citations72
USRE50748EJan 6, 2026
Organic electroluminescence device
IDEMITSU KOSAN CO0 citations63
US12492162B2Dec 9, 2025
Organic electroluminescent element and electronic device
IDEMITSU KOSAN CO0 citations63
US12022728B2Jun 25, 2024
Organic electroluminescent element and electronic device
IDEMITSU KOSAN CO0 citations63
US11552251B2Jan 10, 2023
Organic electroluminescent element and electronic device
IDEMITSU KOSAN CO0 citations63
USRE49343EDec 20, 2022
Organic electroluminescence device
IDEMITSU KOSAN CO0 citations63
US10964891B2Mar 30, 2021
Pyrene derivative, organic light-emitting medium, and organic electroluminescent element containing pyrene derivative or organic light- emitting medium
IDEMITSU KOSAN CO0 citations63
US12590076B2Mar 31, 2026
Compound, material for organic electroluminescent element, organic electroluminescent element, and electronic device
IDEMITSU KOSAN CO0 citations62
US12464943B2Nov 4, 2025
Compound and organic electroluminescent element using same
IDEMITSU KOSAN CO0 citations62
US12384739B2Aug 12, 2025
Compound, material for organic electroluminescent elements, organic electroluminescent element and electronic device
IDEMITSU KOSAN CO0 citations62
US12338234B2Jun 24, 2025
Compound, material for organic electroluminescence device, organic electroluminescence device, and electronic device
IDEMITSU KOSAN CO0 citations62
US12048242B2Jul 23, 2024
Compound, material for organic electroluminescent elements, organic electroluminescent element, and electronic device
IDEMITSU KOSAN CO0 citations62
US11939279B2Mar 26, 2024
Compound, material for organic electroluminescent elements, organic electroluminescent element and electronic device
IDEMITSU KOSAN CO0 citations62
US11744149B2Aug 29, 2023
Compound, material for organic electroluminescent elements, organic electroluminescent element, and electronic device
IDEMITSU KOSAN CO0 citations62
US11730054B2Aug 15, 2023
Compound having dibenzofuran and naphthalene structures, and organic electroluminescent element using same
IDEMITSU KOSAN CO0 citations62
US11665962B2May 30, 2023
Organic electroluminescence element and electronic device
IDEMITSU KOSAN CO0 citations62
US10217954B2Feb 26, 2019
Compound, material for organic electroluminescent element, organic electroluminescent element, and electronic device
IDEMITSU KOSAN CO2 citations62
US11678569B2Jun 13, 2023
Compound, material for organic electroluminescent elements, organic electroluminescent element, and electronic device
IDEMITSU KOSAN CO0 citations52
US11283025B2Mar 22, 2022
Compound, material for organic electroluminescence elements, organic electroluminescence element, and electronic device
IDEMITSU KOSAN CO0 citations52
US11053437B2Jul 6, 2021
Compound, material for organic electroluminescent devices, organic electroluminescent device and electronic device
IDEMITSU KOSAN CO0 citations52
US11053229B2Jul 6, 2021
Compound, material for organic electroluminescent element, organic electroluminescent element, and electronic device
IDEMITSU KOSAN CO0 citations52
US10566541B2Feb 18, 2020
Aromatic amine derivative, material for organic electroluminescent element, and organic electroluminescent element
IDEMITSU KOSAN CO0 citations52
USRE47654EOct 22, 2019
Organic electroluminescence device
IDEMITSU KOSAN CO0 citations52
US10388885B2Aug 20, 2019
Organic electroluminescent device
IDEMITSU KOSAN CO0 citations52
US10297757B2May 21, 2019
Compound, material for organic electroluminescent elements, organic electroluminescent element and electronic device
IDEMITSU KOSAN CO0 citations52
KAWAMURA MASAHIRO
3 patentsUS9099658B2Aug 4, 2015
Organic electroluminescence device
KAWAMURA MASAHIRO16 citations92
US9353027B2May 31, 2016
Organic electroluminescent element using pyrene derivative
KAWAMURA MASAHIRO10 citations84
US9126943B2Sep 8, 2015
Nitrogenated heterocyclic ring derivative and organic electroluminescent element comprising same
KAWAMURA MASAHIRO2 citations63
KAWAMURA YUICHIRO
3 patentsITO HIROKATSU
2 patentsMIZUKI YUMIKO
1 patentShowing the top 50 of 72 patents by PatentIndex Score.