P

Inventor

MASUDA TETSUYA

JP63 patents
⚠️ This page may combine multiple inventors who share the name “MASUDA TETSUYA”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

IDEMITSU KOSAN CO

19 patents
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
US11575087B1Feb 7, 2023

Organic electroluminescence device, light emitting device, organic electroluminescence display device and electronic device

IDEMITSU KOSAN CO7 citations74
US11489121B1Nov 1, 2022

Organic electroluminescent device configured to emit light with high luminous efficiency

IDEMITSU KOSAN CO2 citations73
US10109804B1Oct 23, 2018

Organic electroluminescence device and electronic device

IDEMITSU KOSAN CO2 citations73
US12477945B2Nov 18, 2025

Organic electroluminescence device and electronic apparatus equipped with the same

IDEMITSU KOSAN CO1 citations64
US12284916B2Apr 22, 2025

Organic electroluminescence device and electronic apparatus provided with the same

IDEMITSU KOSAN CO1 citations64
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
US12058930B2Aug 6, 2024

Organic electroluminescence device and electronic apparatus

IDEMITSU KOSAN CO1 citations62
US11665962B2May 30, 2023

Organic electroluminescence element and electronic device

IDEMITSU KOSAN CO0 citations62
US12428409B2Sep 30, 2025

Compound, material for organic electroluminescent elements, organic electroluminescent element, and electronic device

IDEMITSU KOSAN CO0 citations58
US12396318B2Aug 19, 2025

Organic EL display device, and electronic apparatus

IDEMITSU KOSAN CO0 citations52
US12133462B2Oct 29, 2024

Organic electroluminescence device and electronic apparatus equipped with the same

IDEMITSU KOSAN CO0 citations52
US11903308B2Feb 13, 2024

Compound, material for organic electroluminescent element, organic electroluminescent element, and electronic device

IDEMITSU KOSAN CO0 citations52
US11631817B2Apr 18, 2023

Organic electroluminescence element, electronic device, composition, material for organic electroluminescence element, and composition film

IDEMITSU KOSAN CO0 citations52
US11456432B2Sep 27, 2022

Top emission organic electroluminescent element, organic electroluminescent light emitting device, and electronic device

IDEMITSU KOSAN CO0 citations52
US11765972B2Sep 19, 2023

Compound and organic electroluminescence device using the same

IDEMITSU KOSAN CO0 citations50

OTSUKA TECHNO CORP

8 patents

SANYO ELECTRIC CO

6 patents

KONISHIROKU PHOTO IND

5 patents

TOSHIBA KK

2 patents

FUJI PHOTO FILM CO LTD

2 patents

BOSCH CORP

1 patent

SATO KEIJI

1 patent

DIAFOIL HOECHST CO LTD

1 patent

PANASONIC IP MAN CO LTD

1 patent

KONICA MINOLTA INC

1 patent

MITSUBISHI MOTORS CORP

1 patent

MITSUBISHI ELECTRIC CORP

1 patent

MITSUBISHI CHEM CORP

1 patent

Showing the top 50 of 63 patents by PatentIndex Score.