Patent classifications
D
TEXTILES; PAPER
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D01
NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
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D01H
SPINNING OR TWISTING
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4/00
Open-end spinning machines or arrangements for imparting twist to independently moving fibres separated from slivers; Piecing arrangements therefor; Covering endless core threads with fibres by open-end spinning techniques
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D01H4/04
imparting twist by contact of fibres with a running surface
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