Inventor
NAGAOKA MAKOTO
JP32 patents
⚠️ This page may combine multiple inventors who share the name “NAGAOKA MAKOTO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
YOKOYAMA NORIMASA
11 patentsUS9732036B2Aug 15, 2017
Compound having carbazole ring structure, and organic electroluminescent device
YOKOYAMA NORIMASA2 citations62
US9306175B2Apr 5, 2016
Organic electroluminescent device
YOKOYAMA NORIMASA2 citations62
US9196837B2Nov 24, 2015
Compound having indenocarbazole ring structure, and organic electroluminescent device
YOKOYAMA NORIMASA3 citations62
US8735626B2May 27, 2014
Method of producing aromatic amino compounds
YOKOYAMA NORIMASA3 citations62
US8252431B2Aug 28, 2012
Compound wherein substituted bipyridyl group is connected with pyridoindole ring structure through phenylene group, and organic electroluminescent device
YOKOYAMA NORIMASA2 citations62
US8852759B2Oct 7, 2014
Compound having acridan ring structure, and organic electroluminescent device
YOKOYAMA NORIMASA1 citations52
US8642189B2Feb 4, 2014
Substituted bipyridyl compound and organic electroluminescent device
YOKOYAMA NORIMASA0 citations51
US9564600B2Feb 7, 2017
Compound having an indolocarbazole ring structure and organic electroluminescent device
YOKOYAMA NORIMASA1 citations49
US9196839B2Nov 24, 2015
Compound having triphenylamine structure, and organic electroluminescent device
YOKOYAMA NORIMASA1 citations49
US9905770B2Feb 27, 2018
Compound having acridan ring structure, and organic electroluminescent device
YOKOYAMA NORIMASA0 citations41
US9306174B2Apr 5, 2016
Organic electroluminescent device
YOKOYAMA NORIMASA0 citations41
HODOGAYA CHEMICAL CO LTD
10 patentsUS9818949B2Nov 14, 2017
Compound having acridan ring structure, and organic electroluminescent device
HODOGAYA CHEMICAL CO LTD2 citations73
US7812341B2Oct 12, 2010
Compound having oxadiazole ring structure substituted with pyridyl group, and organic electroluminescent device
HODOGAYA CHEMICAL CO LTD2 citations62
US5665506ASep 9, 1997
Toner for the development of electrostatic image and process for the preparation thereof
HODOGAYA CHEMICAL CO LTD4 citations59
US9238624B2Jan 19, 2016
Method of producing aromatic amino compounds
HODOGAYA CHEMICAL CO LTD0 citations52
US7977671B2Jul 12, 2011
Compound having oxadiazole ring structure substituted with pyridyl group and organic electroluminescence device
HODOGAYA CHEMICAL CO LTD0 citations51
US9985216B2May 29, 2018
Indenoindole derivative and organic electroluminescent element
HODOGAYA CHEMICAL CO LTD1 citations50
US9882136B2Jan 30, 2018
Organic electroluminescent device
HODOGAYA CHEMICAL CO LTD1 citations50
US9842999B2Dec 12, 2017
Benzotriazole derivative and an organic electroluminescent device
HODOGAYA CHEMICAL CO LTD0 citations45
US9837620B2Dec 5, 2017
Benzopyridoindole derivative and organic electroluminescent element
HODOGAYA CHEMICAL CO LTD0 citations40
US9871210B2Jan 16, 2018
Naphthotriazole derivatives and organic electroluminescence devices
HODOGAYA CHEMICAL CO LTD0 citations33