Inventor
NUMAZAWA SHIGETAKA
JP6 patents
⚠️ This page may combine multiple inventors who share the name “NUMAZAWA SHIGETAKA”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HODOGAYA CHEMICAL CO LTD
5 patentsUS9123897B2Sep 1, 2015
Benzotriazole derivatives and organic electroluminescent devices using the derivatives
HODOGAYA CHEMICAL CO LTD15 citations79
US9985216B2May 29, 2018
Indenoindole derivative and organic electroluminescent element
HODOGAYA CHEMICAL CO LTD1 citations50
US10738019B2Aug 11, 2020
Compound including basic dye and amino acid, hair dyeing dye, and hair dyeing composition
HODOGAYA CHEMICAL CO LTD0 citations48
US9842999B2Dec 12, 2017
Benzotriazole derivative and an organic electroluminescent device
HODOGAYA CHEMICAL CO LTD0 citations45
US9871210B2Jan 16, 2018
Naphthotriazole derivatives and organic electroluminescence devices
HODOGAYA CHEMICAL CO LTD0 citations33