Inventor

ITO YUKIAKI

3 patents

Patents

3 patents

US4156682AMay 29, 1979

Fluoran compounds and recording sheet containing them

SUMITOMO CHEMICAL CO5 citations58

US4024157AMay 17, 1977

Fluoran compounds and recording sheet containing them

SUMITOMO CHEMICAL CO4 citations58

US3947471AMar 30, 1976

Benz (c) fluoran compounds and recording sheet containing them

SUMITOMO CHEMICAL CO5 citations57