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GB404236A
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Apparatus for drying and roasting fine granular materials
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US1958666A
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Device for drying and roasting granular material
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GB353837A
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Improvements in a method and apparatus for separating dust from air and other gases
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US1704796A
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Means for the continuous drying or distillation of fine granular masses
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US1640502A
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Distillation and coking of carbonaceous materials
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US1687563A
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Revolving-ring oven
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US1705617A
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Drying and grading plants for granular water-containing materials
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US1697006A
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Revolving ring-hearth oven
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US1771756A
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Revolving-ring-hearth oven
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US1774554A
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Apparatus for the recovery of dry distillation material
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US1666656A
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Ring oven with revolving hearth
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US1634027A
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Furnace for the heat treatment of pulverulent, granular, or pulpy material
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US1583974A
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Annular furnace with revolving hearth for continuous working
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GB237376A
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Improvements in or relating to annular furnaces with revolving hearths
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