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3662531
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Patent number 3,662,531
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Issue date May 16, 1972
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D01 - NATURAL OR ARTIFICIAL THREADS OR FIBRES SPINNING
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2819579
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Patent number 2,819,579
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Issue date Jan 14, 1958
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D01 - NATURAL OR ARTIFICIAL THREADS OR FIBRES SPINNING
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2533310
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Patent number 2,533,310
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Issue date Dec 12, 1950
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D01 - NATURAL OR ARTIFICIAL THREADS OR FIBRES SPINNING
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2500343
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Patent number 2,500,343
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Issue date Mar 14, 1950
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D01 - NATURAL OR ARTIFICIAL THREADS OR FIBRES SPINNING