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Solar heat collection
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Patent number 4,217,885
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Issue date Aug 19, 1980
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Solartrap, Inc.
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Vernon O. Bowles
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F24 - HEATING RANGES VENTILATING
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Heat exchanger
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Patent number 4,215,744
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Issue date Aug 5, 1980
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Solartrap, Inc.
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Vernon O. Bowles
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F28 - HEAT EXCHANGE IN GENERAL
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Solar heat collection
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Patent number 4,096,861
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Issue date Jun 27, 1978
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Vernon O. Bowles
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F24 - HEATING RANGES VENTILATING
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