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- Concentration of carbonate and oxide manganese ores from the vicinity of Tracy, Central California
- Beneficiation of oxide and carbonate manganese ores from the Philipsburg District, Granite County, Mont.
- Concentration of oxide manganese ores from Columbia and Elberta mining districts, Tooele and Juab counties, Utah :(Wildcat, Sharp, and Aeronaut no. 1 properties)
- Concentration of oxide manganese ores from the Steelville and Susie Q claims, Beaver County, Utah
- Concentration of oxide manganese ores from the vicinity of Cleveland, Bannock County, Idaho
- Concentration of oxide and silicate manganese ores from Siskiyou and Mendocino Counties, Northern California