Inventor
SADO TAKAYASU
JP33 patents
⚠️ This page may combine multiple inventors who share the name “SADO TAKAYASU”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
IDEMITSU KOSAN CO
22 patentsUS9209406B2Dec 8, 2015
Aromatic heterocyclic derivative, material for organic electroluminescent element, and organic electroluminescent element
IDEMITSU KOSAN CO25 citations92
US11374176B2Jun 28, 2022
Aromatic heterocyclic derivative, material for organic electroluminescent element, and organic electroluminescent element
IDEMITSU KOSAN CO3 citations84
US10418563B2Sep 17, 2019
Aromatic heterocyclic derivative, material for organic electroluminescent element, and organic electroluminescent element
IDEMITSU KOSAN CO4 citations84
US10014477B2Jul 3, 2018
Aromatic amine derivative, and organic electroluminescent element using same
IDEMITSU KOSAN CO8 citations84
US9893296B2Feb 13, 2018
Aromatic heterocyclic derivative, material for organic electroluminescent element, and organic electroluminescent element
IDEMITSU KOSAN CO7 citations84
US9847501B2Dec 19, 2017
Aromatic heterocyclic derivative, material for organic electroluminescent element, and organic electroluminescent element
IDEMITSU KOSAN CO12 citations84
US9196842B2Nov 24, 2015
Aromatic amine derivative and organic electroluminescent element
IDEMITSU KOSAN CO9 citations84
US9373802B2Jun 21, 2016
Biscarbazole derivatives and organic electroluminescence device employing the same
IDEMITSU KOSAN CO7 citations83
US12089492B2Sep 10, 2024
Aromatic heterocyclic derivative, material for organic electroluminescent element, and organic electroluminescent element
IDEMITSU KOSAN CO2 citations73
US10510964B2Dec 17, 2019
Compound, organic electroluminescence device material, organic electroluminescence device and electronic device
IDEMITSU KOSAN CO2 citations73
US10199580B2Feb 5, 2019
Aromatic heterocyclic derivative, material for organic electroluminescent element, and organic electroluminescent element
IDEMITSU KOSAN CO3 citations73
US9871206B2Jan 16, 2018
Compound, organic electroluminescence device material, organic electroluminescence device and electronic device
IDEMITSU KOSAN CO4 citations73
US9818958B2Nov 14, 2017
Biscarbazole derivatives and organic electroluminescence device employing the same
IDEMITSU KOSAN CO2 citations72
US12516042B2Jan 6, 2026
Aromatic heterocyclic derivative, material for organic electroluminescent element, and organic electroluminescent element
IDEMITSU KOSAN CO0 citations62
US11444246B2Sep 13, 2022
Aromatic amine derivative, and organic electroluminescent element using same
IDEMITSU KOSAN CO0 citations62
US11362279B2Jun 14, 2022
Aromatic amine derivative, and organic electroluminescent element using same
IDEMITSU KOSAN CO0 citations62
US10985325B2Apr 20, 2021
Aromatic amine derivative, and organic electroluminescent element using same
IDEMITSU KOSAN CO1 citations62
US11456432B2Sep 27, 2022
Top emission organic electroluminescent element, organic electroluminescent light emitting device, and electronic device
IDEMITSU KOSAN CO0 citations52
US9966539B2May 8, 2018
Organic electroluminescence device
IDEMITSU KOSAN CO1 citations52
US10230057B2Mar 12, 2019
Biscarbazole derivatives and organic electroluminescence device employing the same
IDEMITSU KOSAN CO0 citations51
US9871203B2Jan 16, 2018
Aromatic amine derivative, organic electroluminescent element and electronic device
IDEMITSU KOSAN CO0 citations42
US9559311B2Jan 31, 2017
Anthracene derivative, organic-electroluminescence-device material, organic electroluminescence device, and electronic equipment
IDEMITSU KOSAN CO0 citations41
SEIKO INSTR INC
3 patentsUS7366392B2Apr 29, 2008
Lighting device and display device using the same
SEIKO INSTR INC63 citations97
US7484873B2Feb 3, 2009
Illumination device having elliptical body and display device using the same
SEIKO INSTR INC26 citations92
US7264389B2Sep 4, 2007
Illuminating unit and display device using the unit
SEIKO INSTR INC14 citations83