Assignee
YOKOYAMA NORIMASA
JP26 patents
Top patents by PatentIndex Score
US9732036B2Aug 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
US8168308B2May 1, 2012
Compound having pyridoindole ring structure having substituted pyridyl group attached thereto, and organic electroluminescence element
YOKOYAMA NORIMASA4 citations62
US8748014B2Jun 10, 2014
Compound having a substituted anthracene ring structure and pyridoindole ring structure, and organic electroluminescent device
YOKOYAMA NORIMASA3 citations61
US8586210B2Nov 19, 2013
Compound having substituted anthracene ring structure and pyridoindole ring structure and organic electroluminescence device
YOKOYAMA NORIMASA3 citations60
US9444055B2Sep 13, 2016
Organic electroluminescent device
YOKOYAMA NORIMASA0 citations52
US8852759B2Oct 7, 2014
Compound having acridan ring structure, and organic electroluminescent device
YOKOYAMA NORIMASA1 citations52
US10541369B2Jan 21, 2020
Compound having substituted bipyridyl group and pyridoinodole ring structure, and organic electroluminescent device
YOKOYAMA NORIMASA0 citations51
US9005776B2Apr 14, 2015
Compound having benzotriazole ring structure and organic electroluminescent element
YOKOYAMA NORIMASA1 citations51
US8927119B2Jan 6, 2015
Compound having substituted anthracene ring structure and pyridoindole ring structure, and organic electroluminescent device
YOKOYAMA NORIMASA0 citations51
US8771841B2Jul 8, 2014
Organic electroluminescent device
YOKOYAMA NORIMASA1 citations51
US8722209B2May 13, 2014
Compound having pyridoindole ring structure having substituted pyridyl group attached thereto, and organic electroluminescence element
YOKOYAMA NORIMASA0 citations51
US8642189B2Feb 4, 2014
Substituted bipyridyl compound and organic electroluminescent device
YOKOYAMA NORIMASA0 citations51
US10059725B2Aug 28, 2018
Compound having triphenylsilyl group and triarylamine structure, and organic electroluminescent device
YOKOYAMA NORIMASA1 citations50
US8624228B2Jan 7, 2014
Compound having pyridoindole ring structure bonded with substituted pyridyl group, and organic electroluminescent device
YOKOYAMA NORIMASA1 citations50
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
US8716698B2May 6, 2014
Organic electroluminescent device containing arylamine compound and bipyridyl compound
YOKOYAMA NORIMASA0 citations41
US9553272B2Jan 24, 2017
Organic electroluminescent device
YOKOYAMA NORIMASA0 citations39
US9634258B2Apr 25, 2017
Compounds having bipyridyl group and carbazole ring, and organic electroluminescent element
YOKOYAMA NORIMASA0 citations36
US8153277B2Apr 10, 2012
Compound having thiadiazole ring structure substituted with pyridyl group and organic electroluminescent device
YOKOYAMA NORIMASA0 citations34