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Solar furnace
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Patent number 9,464,821
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Issue date Oct 11, 2016
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PDB Energy Systems Limited
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Brian Howard
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F03 - MACHINES OR ENGINES FOR LIQUIDS WIND, SPRING WEIGHT AND MISCELLANEOUS M...
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Solar water heating
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Patent number 6,679,247
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Issue date Jan 20, 2004
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David T. Gozikowski
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F24 - HEATING RANGES VENTILATING
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3853114
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Patent number 3,853,114
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Issue date Dec 10, 1974
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F24 - HEATING RANGES VENTILATING
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3287901
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Patent number 3,287,901
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Issue date Nov 29, 1966
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F17 - STORING OF DISTRIBUTING GASES OR LIQUIDS
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2213894
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Patent number 2,213,894
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Issue date Sep 3, 1940
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F24 - HEATING RANGES VENTILATING