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Building block insert
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Patent number 5,209,037
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Issue date May 11, 1993
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ThermaLock Products, Inc.
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Francis A. Kennedy
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B28 - WORKING CEMENT, CLAY, OR STONE
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Insulated building block
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Patent number 4,986,049
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Issue date Jan 22, 1991
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ThermaLock Products, Inc.
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Francis A. Kennedy
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E04 - BUILDING