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US1776355A
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Mold for casting metals
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US1785941A
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Mold for casting metals
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CA398249A
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Mould stool for casting metals
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CA303050A
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Apparatus for casting metals
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CA380935A
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Deoxidized copper casting apparatus
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CA352147A
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Fusible metal sweating out method
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CA607543A
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Concentration of potash ores
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CA361355A
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Stool for moulds
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CA370226A
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Copper melting method
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CA372757A
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White metal alloy refining process
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CA329429A
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Copper refining apparatus
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CA307860A
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Method of removing copper oxide from copper
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CA518702A
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Mold and method for continuous casting
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CA325275A
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Copper casting mould
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CA403914A
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Copper refining apparatus
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CA364133A
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Metal refining method
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CA364027A
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Copper casting apparatus
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CA499300A
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Inspection conveyor
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CA307861A
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Continuous copper melting furnace
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CA488507A
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Pouring furnace
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