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Double-twist apparatus
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Patent number 3,991,546
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Issue date Nov 16, 1976
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Hamel GmbH Zwirnmaschinen
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Siegfried Scherf
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D01 - NATURAL OR ARTIFICIAL THREADS OR FIBRES SPINNING
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3640144
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Patent number 3,640,144
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Issue date Feb 8, 1972
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D01 - NATURAL OR ARTIFICIAL THREADS OR FIBRES SPINNING
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3166882
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Patent number 3,166,882
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Issue date Jan 26, 1965
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D01 - NATURAL OR ARTIFICIAL THREADS OR FIBRES SPINNING
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2497881
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Patent number 2,497,881
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Issue date Feb 21, 1950
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D01 - NATURAL OR ARTIFICIAL THREADS OR FIBRES SPINNING
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2252037
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Patent number 2,252,037
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Issue date Aug 12, 1941
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D01 - NATURAL OR ARTIFICIAL THREADS OR FIBRES SPINNING