Inventor
HAKETA TASUKU
JP45 patents
Patents
45 patentsUS10435350B2Oct 8, 2019
Organic electroluminecence device
IDEMITSU KOSAN CO128 citations99
US11548877B2Jan 10, 2023
Compound, material for organic electroluminescence device, organic electroluminescence device, and electronic device
IDEMITSU KOSAN CO2 citations73
US11069861B2Jul 20, 2021
Mixture, organic electroluminescence device and electronic equipment
IDEMITSU KOSAN CO2 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
US9902687B2Feb 27, 2018
Compound
IDEMITSU KOSAN CO2 citations73
US10424740B2Sep 24, 2019
Compound, material for organic electroluminescence devices, organic electroluminescence device, and electronic device
IDEMITSU KOSAN CO2 citations72
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
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
US12012389B2Jun 18, 2024
Compound, material for organic electroluminescent element, organic electroluminescent element, and electronic device
IDEMITSU KOSAN CO0 citations62
US11795155B2Oct 24, 2023
Compound having naphthobenzofuranyl structure, material for organic electroluminescence device, organic electroluminescence device, and electronic instrument
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
US11489128B1Nov 1, 2022
Organic electroluminescent element emitting light at high luminous effiency and electronic device
IDEMITSU KOSAN CO1 citations62
US11393986B2Jul 19, 2022
Mixture, organic electroluminescence device and electronic equipment
IDEMITSU KOSAN CO0 citations62
US10217954B2Feb 26, 2019
Compound, material for organic electroluminescent element, organic electroluminescent element, and electronic device
IDEMITSU KOSAN CO2 citations62
US10170707B2Jan 1, 2019
Compound, material for organic electroluminescence element, organic electroluminescence element, and electronic device
IDEMITSU KOSAN CO1 citations62
US12514115B2Dec 30, 2025
Organic electroluminescence device and electronic apparatus
IDEMITSU KOSAN CO0 citations52
US11678569B2Jun 13, 2023
Compound, material for organic electroluminescent elements, organic electroluminescent element, 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
US11053437B2Jul 6, 2021
Compound, material for organic electroluminescent devices, organic electroluminescent device and electronic device
IDEMITSU KOSAN CO0 citations52
US10790449B2Sep 29, 2020
Compound, material for organic electroluminescence element, organic electroluminescence element, and electronic device
IDEMITSU KOSAN CO0 citations52
US10297757B2May 21, 2019
Compound, material for organic electroluminescent elements, organic electroluminescent element and electronic device
IDEMITSU KOSAN CO0 citations52
US10205099B2Feb 12, 2019
Condensed fluoranthene compound, organic electroluminescence element material including same, organic electroluminescence element using same, and electronic device
IDEMITSU KOSAN CO0 citations52
US10118889B2Nov 6, 2018
Compound
IDEMITSU KOSAN CO0 citations52
US12369490B2Jul 22, 2025
Organic electroluminescent element, organic electroluminescent display device, and electronic device
IDEMITSU KOSAN CO0 citations51
US12069943B2Aug 20, 2024
Compound, material for organic electroluminescent elements, organic electroluminescent element, and electronic device
IDEMITSU KOSAN CO0 citations51
US11618740B2Apr 4, 2023
Compound, material for organic electroluminescence devices, organic electroluminescence device, and electronic device
IDEMITSU KOSAN CO0 citations51
US11479544B2Oct 25, 2022
Compound, material for organic electroluminescence element, organic electroluminescence element, and electronic device
IDEMITSU KOSAN CO0 citations51
US10941144B2Mar 9, 2021
Organic electroluminescence device and electronic device
IDEMITSU KOSAN CO0 citations51
US11691983B2Jul 4, 2023
Specifically substituted benzofuro- and benzothienoquinolines for organic light emitting diodes
IDEMITSU KOSAN CO0 citations50
US12543494B2Feb 3, 2026
Compound, material for organic electroluminescent elements, organic electroluminescent element, and electronic device
IDEMITSU KOSAN CO0 citations49
US10629821B2Apr 21, 2020
Compound, material for organic electroluminescent elements using same, and organic electroluminescent element and electronic device each using same
IDEMITSU KOSAN CO0 citations42
US9887367B2Feb 6, 2018
Heterocyclic compound, material for organic electroluminescent elements using same, organic electroluminescent element using same, and electronic device
IDEMITSU KOSAN CO0 citations42
US10840456B2Nov 17, 2020
Compound, material for organic electroluminescence devices, organic electroluminescence device, and electronic device
IDEMITSU KOSAN CO0 citations41
US10784446B2Sep 22, 2020
Compound, organic electroluminescence element material, organic electroluminescence element and electronic device
IDEMITSU KOSAN CO0 citations41
US10703762B2Jul 7, 2020
Compound, material for organic electroluminescence device, organic electroluminescence device and electronic apparatus
IDEMITSU KOSAN CO0 citations41
US10622569B2Apr 14, 2020
Compound, organic electroluminescent element, and electronic device
IDEMITSU KOSAN CO0 citations41
US10547007B2Jan 28, 2020
Compound, organic electroluminescent material, organic electroluminescent element, and electronic apparatus
IDEMITSU KOSAN CO0 citations41
US10396288B2Aug 27, 2019
Organic electroluminescent element and electronic device
IDEMITSU KOSAN CO0 citations41
US10211404B2Feb 19, 2019
Compound, material for organic electroluminescent elements, organic electroluminescent element and electronic device
IDEMITSU KOSAN CO0 citations41
US9991455B2Jun 5, 2018
Amine compound and organic electroluminescent element
IDEMITSU KOSAN CO0 citations41
US9837615B2Dec 5, 2017
Nitrogen-containing heterocyclic derivative, organic electroluminescence element material using same, and organic electroluminescence element and electronic device using same
IDEMITSU KOSAN CO0 citations41