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3620707
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Patent number 3,620,707
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Issue date Nov 16, 1971
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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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2613479
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Patent number 2,613,479
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Issue date Oct 14, 1952
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C03 - GLASS MINERAL OR SLAG WOOL
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2601744
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Patent number 2,601,744
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Issue date Jul 1, 1952
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C03 - GLASS MINERAL OR SLAG WOOL
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2552108
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Patent number 2,552,108
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Issue date May 8, 1951
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C03 - GLASS MINERAL OR SLAG WOOL
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2532091
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Patent number 2,532,091
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Issue date Nov 28, 1950
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C03 - GLASS MINERAL OR SLAG WOOL
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2469597
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Patent number 2,469,597
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Issue date May 10, 1949
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C03 - GLASS MINERAL OR SLAG WOOL
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1645086
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Patent number 1,645,086
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Issue date Oct 11, 1927
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C03 - GLASS MINERAL OR SLAG WOOL
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1482455
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Patent number 1,482,455
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Issue date Feb 5, 1924
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C03 - GLASS MINERAL OR SLAG WOOL