Device for separating and concentrating ores
United States Patent 1744785

Inventors:
Wray, Mctaggart Arthur
Publication Date:
01/28/1930
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Assignee:
Wray, Mctaggart Arthur
Primary Class:
261/121.100
Other Classes:
261/93, 209/170, 209/169, 209/168
International Classes:
B03D1/16; B03D1/14