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Home › Dyes for keratin fibers, the dyes containing n-benzyl-p-phenylenediamine derivatives and novel n-benzyl-p-phenylenediamine derivatives

Dyes for keratin fibers, the dyes containing n-benzyl-p-phenylenediamine derivatives and novel n-benzyl-p-phenylenediamine derivatives

US Patent RE41549 · Granted Aug 24, 2010

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