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• Concentration of oxide manganese ore from Sheep Mountain property, Durkee district, Oreg.
• Concentration of carbonate and oxide manganese ores from the vicinity of Tracy, Central California
• Concentration of oxide manganese ores from the Havasu Lake District, California and Arizona
• Concentration of manganese ores from Lincoln County, Nev.
• Concentration of manganese ores from Boulder Dam Recreational Area, Clark County, Nev.
• Concentration of oxide manganese ores from the Turtle claims and Pacific Coast Manganese properties, Paymaster District, Imperial County, Calif.
• Concentration of manganese ores from Piute and Kane counties, southern Utah