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3642585
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Patent number 3,642,585
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Issue date Feb 15, 1972
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D06 - TREATMENT OF TEXTILES OR THE LIKE LAUNDERING FLEXIBLE MATERIALS NOT OTH...
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3177107
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Patent number 3,177,107
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Issue date Apr 6, 1965
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C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
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2736731
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Patent number 2,736,731
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Issue date Feb 28, 1956
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C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
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1797805
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Patent number 1,797,805
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Issue date Mar 24, 1931
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C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES