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1785084
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Patent number 1,785,084
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Issue date Dec 16, 1930
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C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
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1785083
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Patent number 1,785,083
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Issue date Dec 16, 1930
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D06 - TREATMENT OF TEXTILES OR THE LIKE LAUNDERING FLEXIBLE MATERIALS NOT OTH...