Inventor · disambiguated record

Hiroshi Okayasu

Also filed as: OKAYASU HIROSHI

2 granted patents·24 citations·filing 1987–1987

60Inventor score

Technology areasC09B

Files withSUMITOMO CHEMICAL CO2

Top patents by PatentIndex Score

2 records

0181US4804417AProcess for producing dioxazine violet pigmentSUMITOMO CHEMICAL CO·Filed 1987·Granted Feb 14, 1989·18 cites·9 claims
0254US4785091AProcess for producing copper phthalocyanine pigmentSUMITOMO CHEMICAL CO·Filed 1987·Granted Nov 15, 1988·6 cites·8 claims

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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →