P

Inventor

OHKAWA MASAAKI

6 patents
⚠️ This page may combine multiple inventors who share the name “OHKAWA MASAAKI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

SUMITOMO CHEMICAL CO

4 patents
US3933847AJan 20, 1976

Method relating to manufacture of coumarin derivatives

SUMITOMO CHEMICAL CO13 citations72
US3966594AJun 29, 1976

Treatment of aqueous waste solution

SUMITOMO CHEMICAL CO16 citations70
US3974178AAug 10, 1976

Naphthostyril cationic dyes

SUMITOMO CHEMICAL CO3 citations59
US4018756AApr 19, 1977

Thiazole and benzothiazole cationic dyes

SUMITOMO CHEMICAL CO4 citations57

HITACHI LTD

2 patents
US5378934AJan 3, 1995

Circuit having a master-and-slave and a by-pass

HITACHI LTD27 citations92
US5227674AJul 13, 1993

Semiconductor integrated circuit device

HITACHI LTD19 citations73