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3539539
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Patent number 3,539,539
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Issue date Nov 10, 1970
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C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
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3423183
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Patent number 3,423,183
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C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
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3212859
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Patent number 3,212,859
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Issue date Oct 19, 1965
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B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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3160397
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Patent number 3,160,397
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D01 - NATURAL OR ARTIFICIAL THREADS OR FIBRES SPINNING
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2942859
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B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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2122900
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B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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2076478
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Issue date Apr 6, 1937
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B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL