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3628939
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Patent number 3,628,939
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Issue date Dec 21, 1971
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C03 - GLASS MINERAL OR SLAG WOOL
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3399984
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Patent number 3,399,984
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Issue date Sep 3, 1968
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C03 - GLASS MINERAL OR SLAG WOOL
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3243278
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Patent number 3,243,278
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Issue date Mar 29, 1966
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C03 - GLASS MINERAL OR SLAG WOOL
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3186819
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Patent number 3,186,819
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Issue date Jun 1, 1965
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C03 - GLASS MINERAL OR SLAG WOOL
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3169657
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Patent number 3,169,657
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Issue date Feb 16, 1965
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C03 - GLASS MINERAL OR SLAG WOOL
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3129085
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Patent number 3,129,085
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Issue date Apr 14, 1964
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C03 - GLASS MINERAL OR SLAG WOOL
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3091105
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Patent number 3,091,105
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Issue date May 28, 1963
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C03 - GLASS MINERAL OR SLAG WOOL
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1776574
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Patent number 1,776,574
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Issue date Sep 23, 1930
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C03 - GLASS MINERAL OR SLAG WOOL