Patent classifications
D
TEXTILES; PAPER
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D01
NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
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D01C
CHEMICAL OR BIOLOGICAL TREATMENT OF NATURAL FILAMENTARY OR FIBROUS MATERIAL TO OBTAIN FILAMENTS OR FIBRES FOR SPINNING; CARBONISING RAGS TO RECOVER ANIMAL FIBRES
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Treatment of vegetable material
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D01C1/02
by chemical methods to obtain bast fibres
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