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US1267347A
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Process of electrical reduction.
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US1264628A
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Distilling process for recovering metals from ores and metal-bearing materials.
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US1264629A
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Process for recovering mercury.
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US1242340A
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Apparatus for distilling metallic ores and metal-bearing materials.
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US1242554A
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Electrode-holder.
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US1242341A
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Electric furnace.
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US1242339A
|
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Process for distilling metallic ores.
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US1249061A
|
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Process for producing spelter.
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US1271560A
|
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Apparatus and method for condensing zinc-vapor.
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US1242337A
|
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Electrical distilling apparatus.
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US1273844A
|
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Process for roasting ore.
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