GB666026A
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New trisazo dyestuff
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GB649313A
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New azo dyestuffs
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GB618007A
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A new azo dyestuff
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GB604832A
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New azo dyestuff
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GB604831A
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A new azo-dyestuff
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GB596109A
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New tris-azo dyestuffs
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GB562762A
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New azo dyestuffs
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GB543712A
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New black tetrakisazo dyestuffs
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GB529405A
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Improvements in fur-dyeing
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GB499322A
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Making disazo leather dyes
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GB476428A
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Manufacture and application of new azo dyestuffs
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GB475966A
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Dyeing of furs, pelts and hair and new dyestuffs therefor
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GB470787A
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Colouring of leather
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