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3812949
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Patent number 3,812,949
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Issue date May 28, 1974
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C03 - GLASS MINERAL OR SLAG WOOL
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3650724
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Patent number 3,650,724
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Issue date Mar 21, 1972
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C03 - GLASS MINERAL OR SLAG WOOL
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3328148
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Patent number 3,328,148
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Issue date Jun 27, 1967
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C03 - GLASS MINERAL OR SLAG WOOL
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3309190
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Patent number 3,309,190
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Issue date Mar 14, 1967
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C03 - GLASS MINERAL OR SLAG WOOL
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3208229
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Patent number 3,208,229
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Issue date Sep 28, 1965
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F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
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3173273
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Patent number 3,173,273
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Issue date Mar 16, 1965
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F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
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3001329
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Patent number 3,001,329
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Issue date Sep 26, 1961
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C03 - GLASS MINERAL OR SLAG WOOL
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2563130
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Patent number 2,563,130
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Issue date Aug 7, 1951
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C03 - GLASS MINERAL OR SLAG WOOL
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2561529
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Patent number 2,561,529
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Issue date Jul 24, 1951
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C03 - GLASS MINERAL OR SLAG WOOL
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2519059
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Patent number 2,519,059
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Issue date Aug 15, 1950
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C03 - GLASS MINERAL OR SLAG WOOL
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2492216
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Patent number 2,492,216
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Issue date Dec 27, 1949
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C03 - GLASS MINERAL OR SLAG WOOL
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2484925
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Patent number 2,484,925
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Issue date Oct 18, 1949
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C03 - GLASS MINERAL OR SLAG WOOL