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US2014278757A1
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Method and apparatus for lead generation
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US2523674A
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Auxiliary propulsion mechanism
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US2412555A
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Plate grapple
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US2100465A
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Variable speed transmission unit
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US1745656A
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Liquid-dispensing attachment
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US1224057A
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Method of recovering zinc and iron from solutions thereof.
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US1077114A
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Flying-machine.
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US972149A
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Method of treating ores.
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US874481A
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Filter or separator for pneumatic cleaners.
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US816061A
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Process of treating ores.
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US841103A
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Process of treating ores.
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US841102A
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Process of treating ores.
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US782894A
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Electrolytic process of reducing metallic sulfids.
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US782893A
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Method of treating alkali-metal amalgam.
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CA80980A
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Treatment of telluride ores of gold and silver
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CA80979A
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Treatment of refractory complex ores of gold and silver
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CA79431A
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Electrolytic apparatus for recovering metals
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US741439A
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Process of treating ores.
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US739375A
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Process of producing sodium peroxid.
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US728834A
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Anchor device for engine-beds.
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