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1756991
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Patent number 1,756,991
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Issue date May 6, 1930
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F26 - DRYING
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1718544
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Patent number 1,718,544
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Issue date Jun 25, 1929
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F26 - DRYING
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1718543
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Patent number 1,718,543
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Issue date Jun 25, 1929
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F26 - DRYING
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1714853
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Patent number 1,714,853
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Issue date May 28, 1929
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F26 - DRYING