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US2211895A
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Apparatus for the treatments of materials in grains or pieces, such as minerals, coals, and the like
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GB494998A
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Process and apparatus for treating materials in grains, such as minerals, coals and the like, containing particles of comparatively small sizes
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US2184594A
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Quantitative separation of materials
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GB456770A
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Improvements in or relating to the washing of coal, ores and similar materials
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GB456895A
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Improvements in or relating to the quantitative and/or qualitative separation of materials in grains or pieces, such as minerals, coals and the like
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GB405874A
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Improvements in or relating to the mechanical dressing of coals, ores and similar materials
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GB371174A
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Improved process and apparatus for separating or grading granular material such as coal and ores
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GB303810A
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Separating apparatus for the treatment of ores, coals and other similar materials
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US1961666A
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Process and apparatus for separating ores
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GB294210A
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A process and apparatus for washing materials, such as ores, coals and the like
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US1912077A
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Process and apparatus for the treatment of coals, ores, and the like, mainly composed of particles of small sizes
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GB266723A
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Improvements in or relating to washing coal, ores and like substances
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US1696767A
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Method of washing coal, ores, and other similar materials, and automatic water-current separator for carrying the method into practice
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GB265202A
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Improvements in or relating to washing coal, ores and like substances
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US1845602A
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Method for washing coal, ores, and other similar material and apparatus for carryingout said method
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GB258753A
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Improvements in or relating to washing coal, ores, and other similar material
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