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GB347171

Year of Publication 16.04.1931
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Patent
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Manufacture of new dyestuffs

Year of Publication 20.01.1932
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Patent
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JPH0780819B

Year of Publication 30.08.1995
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Patent
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Manufacture of condensation products

Year of Publication 16.01.1942
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CH603044

by JOHN LAWRENCE HUPPATZ
Year of Publication 15.08.1978
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Patent