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Knot hole beam
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Patent number 4,160,532
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Issue date Jul 10, 1979
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Sulzer Brothers, Ltd.
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Hans Demuth
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D02 - YARNS MECHANICAL FINISHING OF YARNS OR ROPES WARPING OR BEAMING
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2102020
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Patent number 2,102,020
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Issue date Dec 14, 1937
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D02 - YARNS MECHANICAL FINISHING OF YARNS OR ROPES WARPING OR BEAMING
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2027749
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Patent number 2,027,749
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Issue date Jan 14, 1936
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D02 - YARNS MECHANICAL FINISHING OF YARNS OR ROPES WARPING OR BEAMING