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Solar panel
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Patent number 4,346,693
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Issue date Aug 31, 1982
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Gerard Wagner
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F24 - HEATING RANGES VENTILATING
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Solar heater
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Patent number 4,280,483
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Issue date Jul 28, 1981
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I. Lawrence Schaffer
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F24 - HEATING RANGES VENTILATING
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Heat transfer system
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Patent number 4,219,076
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Issue date Aug 26, 1980
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Glen P. Robinson
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F24 - HEATING RANGES VENTILATING
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3875925
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Patent number 3,875,925
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Issue date Apr 8, 1975
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F24 - HEATING RANGES VENTILATING