Inventor
KAWAMURA YUICHIRO
JP54 patents
⚠️ This page may combine multiple inventors who share the name “KAWAMURA YUICHIRO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
IDEMITSU KOSAN CO
31 patentsUS8372527B2Feb 12, 2013
Material for organic electroluminescent element, and organic electroluminescent element
IDEMITSU KOSAN CO22 citations92
US9812661B2Nov 7, 2017
Organic electroluminescent device
IDEMITSU KOSAN CO12 citations84
US8723171B2May 13, 2014
Organic electroluminescence device
IDEMITSU KOSAN CO11 citations84
US9947876B2Apr 17, 2018
Organic electroluminescence device and electronic device
IDEMITSU KOSAN CO11 citations83
US11482675B1Oct 25, 2022
Organic electroluminescence device and electronic apparatus
IDEMITSU KOSAN CO7 citations73
US11043638B2Jun 22, 2021
Organic electroluminescence device and electronic device
IDEMITSU KOSAN CO2 citations73
US10547009B2Jan 28, 2020
Organic electroluminescent element, electronic device and compound
IDEMITSU KOSAN CO5 citations73
US9997717B2Jun 12, 2018
Organic electroluminescence device and electronic device
IDEMITSU KOSAN CO5 citations73
US8748015B2Jun 10, 2014
Indenofluorenedione derivative, material for organic electroluminescent element, and organic electroluminescent element
IDEMITSU KOSAN CO7 citations73
US12492162B2Dec 9, 2025
Organic electroluminescent element and electronic device
IDEMITSU KOSAN CO0 citations63
US12029119B2Jul 2, 2024
Organic electroluminescence 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
US11322711B2May 3, 2022
Organic EL light emitting apparatus and electronic instrument
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
US12317740B2May 27, 2025
Organic electroluminescence device and electronic apparatus
IDEMITSU KOSAN CO0 citations62
US11600780B1Mar 7, 2023
Organic electroluminescence device and electronic apparatus
IDEMITSU KOSAN CO0 citations62
US11271164B2Mar 8, 2022
Compound, composition, organic electroluminescent element and electronic device
IDEMITSU KOSAN CO2 citations62
US11201297B2Dec 14, 2021
Organic electroluminescence device and electronic device
IDEMITSU KOSAN CO1 citations61
US12583864B2Mar 24, 2026
Organic electroluminescent element and electronic device
IDEMITSU KOSAN CO0 citations52
US12396318B2Aug 19, 2025
Organic EL display device, and electronic apparatus
IDEMITSU KOSAN CO0 citations52
US11653511B2May 16, 2023
Organic EL light-emitting apparatus and electronic instrument
IDEMITSU KOSAN CO0 citations52
US11456425B2Sep 27, 2022
Organic electroluminescent element, and electronic apparatus
IDEMITSU KOSAN CO0 citations52
US10854838B2Dec 1, 2020
Organic EL light emitting apparatus and electronic instrument
IDEMITSU KOSAN CO0 citations52
USRE47654EOct 22, 2019
Organic electroluminescence device
IDEMITSU KOSAN CO0 citations52
US10351765B2Jul 16, 2019
Organic electroluminescence element and electronic device
IDEMITSU KOSAN CO0 citations52
US10125310B2Nov 13, 2018
Organic electroluminescence element and electronic device
IDEMITSU KOSAN CO0 citations52
US12538638B2Jan 27, 2026
Organic electroluminescent element and electronic device
IDEMITSU KOSAN CO0 citations51
US12448353B2Oct 21, 2025
Compound, material for organic electroluminescent element, organic electroluminescent element, and electronic device
IDEMITSU KOSAN CO0 citations51
US11723272B2Aug 8, 2023
Organic electroluminescence element and electronic device
IDEMITSU KOSAN CO0 citations51
US11618722B2Apr 4, 2023
Compound, composition, organic electroluminescent element, and electronic appliance
IDEMITSU KOSAN CO0 citations51
KAWAMURA MASAHIRO
3 patentsUS8221907B2Jul 17, 2012
Chrysene derivative and organic electroluminescent device using the same
KAWAMURA MASAHIRO42 citations94
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 patentsMIZUKI YUMIKO
3 patentsUS9169274B2Oct 27, 2015
Pyrene derivative and organic electroluminescent element using the same
MIZUKI YUMIKO9 citations84
US10014476B2Jul 3, 2018
Pyrene derivative, organic light-emitting medium, and organic electroluminescent element containing pyrene derivative or organic light-emitting medium
MIZUKI YUMIKO0 citations52
US9269907B2Feb 23, 2016
Aromatic amine derivative and organic electroluminescence device using the same
MIZUKI YUMIKO0 citations52
KUMA HITOSHI
2 patentsITO HIROKATSU
2 patentsNISHIMURA KAZUKI
1 patentYOSHIDA KEI
1 patentMORISHITA HIRONOBU
1 patentMITSUBISHI CHEM CORP
1 patentYABE MASAYOSHI
1 patentJINDE YUKITOSHI
1 patentShowing the top 50 of 54 patents by PatentIndex Score.