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Heat transfer apparatus
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Patent number 5,339,654
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Issue date Aug 23, 1994
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Columbia Gas System Service Corporation
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F. Bert Cook
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F28 - HEAT EXCHANGE IN GENERAL
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Dual cooling/heating process and composition
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Patent number 4,742,687
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Issue date May 10, 1988
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Columbia Gas System Service Corporation
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Edward A. Reid
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F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
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Dual cooling/heating system energy recovery
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Patent number 4,691,532
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Issue date Sep 8, 1987
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Columbia Gas System Service Corp
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Edward A. Reid
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F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
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Absorption refrigeration and heat pump system
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Patent number 4,646,541
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Issue date Mar 3, 1987
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Columbia Gas System Service Corporation
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Edward A. Reid
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F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...