Inventor
HATAKEYAMA TAKUJI
JP29 patents
⚠️ This page may combine multiple inventors who share the name “HATAKEYAMA TAKUJI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
KWANSEI GAKUIN EDUCATIONAL FOUND
23 patentsUS10374166B2Aug 6, 2019
Polycyclic aromatic compound
KWANSEI GAKUIN EDUCATIONAL FOUND52 citations95
US10689402B2Jun 23, 2020
Polycyclic aromatic compound and light emission layer-forming composition
KWANSEI GAKUIN EDUCATIONAL FOUND7 citations84
US10680186B2Jun 9, 2020
Polycyclic aromatic compound and light emitting layer-forming composition
KWANSEI GAKUIN EDUCATIONAL FOUND4 citations73
US11407774B2Aug 9, 2022
Polycyclic aromatic compound
KWANSEI GAKUIN EDUCATIONAL FOUND2 citations72
US10686141B2Jun 16, 2020
Polycyclic aromatic compound
KWANSEI GAKUIN EDUCATIONAL FOUND4 citations71
US10811613B2Oct 20, 2020
Polycyclic aromatic compound
KWANSEI GAKUIN EDUCATIONAL FOUND3 citations70
US11723263B2Aug 8, 2023
Organic electroluminescent element
KWANSEI GAKUIN EDUCATIONAL FOUND4 citations69
US11807656B2Nov 7, 2023
Polycyclic aromatic compound and light emission layer-forming composition
KWANSEI GAKUIN EDUCATIONAL FOUND0 citations62
US11637249B2Apr 25, 2023
Organic electroluminescent element
KWANSEI GAKUIN EDUCATIONAL FOUND1 citations62
US11637250B2Apr 25, 2023
Polycyclic aromatic compound and light emitting layer-forming composition
KWANSEI GAKUIN EDUCATIONAL FOUND0 citations62
US11136341B2Oct 5, 2021
Polycyclic aromatic compound and light emission layer-forming composition
KWANSEI GAKUIN EDUCATIONAL FOUND1 citations62
US11711970B2Jul 25, 2023
Organic electroluminescent device
KWANSEI GAKUIN EDUCATIONAL FOUND1 citations61
US11653565B2May 16, 2023
Polycyclic aromatic compound
KWANSEI GAKUIN EDUCATIONAL FOUND0 citations61
US11539003B2Dec 27, 2022
Polycyclic aromatic amino compound
KWANSEI GAKUIN EDUCATIONAL FOUND1 citations61
US11248009B2Feb 15, 2022
Polycyclic aromatic compound, material for an organic device, organic electroluminescent element, display apparatus and lighting apparatus
KWANSEI GAKUIN EDUCATIONAL FOUND1 citations61
US12473315B2Nov 18, 2025
Polycyclic aromatic compound
KWANSEI GAKUIN EDUCATIONAL FOUND0 citations60
US11800785B2Oct 24, 2023
Material for organic device and organic electroluminescent device using the same
KWANSEI GAKUIN EDUCATIONAL FOUND1 citations60
US11877506B2Jan 16, 2024
Polycyclic aromatic compound
KWANSEI GAKUIN EDUCATIONAL FOUND1 citations58
US12185625B2Dec 31, 2024
Organic electroluminescence element, display device, and lighting device
KWANSEI GAKUIN EDUCATIONAL FOUND0 citations56
US11342506B2May 24, 2022
Organic electroluminescent element
KWANSEI GAKUIN EDUCATIONAL FOUND0 citations51
US11647666B2May 9, 2023
Organic electroluminescent element
KWANSEI GAKUIN EDUCATIONAL FOUND0 citations50
US11139438B2Oct 5, 2021
Organic electroluminescent element
KWANSEI GAKUIN EDUCATIONAL FOUND0 citations49
US11600790B2Mar 7, 2023
Polycyclic aromatic compound for organic electroluminescent device
KWANSEI GAKUIN EDUCATIONAL FOUND0 citations48