Inventor
AKAMATSU TAKASHI
JP7 patents
⚠️ This page may combine multiple inventors who share the name “AKAMATSU TAKASHI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
SUMITOMO CHEMICAL CO
4 patentsUS4077971AMar 7, 1978
Tetrahydrophthalimide methyl-2-phenylbenzatriazoles
SUMITOMO CHEMICAL CO9 citations65
US4041051AAug 9, 1977
Anthraquinone disperse dyestuffs
SUMITOMO CHEMICAL CO2 citations62
US4055565AOct 25, 1977
Optical brightening agents of naphthalimide derivatives
SUMITOMO CHEMICAL CO5 citations60
US3947471AMar 30, 1976
Benz (c) fluoran compounds and recording sheet containing them
SUMITOMO CHEMICAL CO5 citations57