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Central heating radiators
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Patent number 6,607,022
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Issue date Aug 19, 2003
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Oystertec Plc
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Paul Anthony Davidson
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F24 - HEATING RANGES VENTILATING
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3561728
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Patent number 3,561,728
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Issue date Feb 9, 1971
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F24 - HEATING RANGES VENTILATING
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1927991
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Patent number 1,927,991
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Issue date Sep 26, 1933
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F24 - HEATING RANGES VENTILATING
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1798892
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Patent number 1,798,892
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Issue date Mar 31, 1931
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F24 - HEATING RANGES VENTILATING
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876714
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Patent number 876,714
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Issue date Jan 14, 1908
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F24 - HEATING RANGES VENTILATING