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2340179
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Patent number 2,340,179
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Issue date Jan 25, 1944
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B03 - SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES O...
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2340180
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Patent number 2,340,180
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Issue date Jan 25, 1944
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B03 - SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES O...