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发明名称
Method of coloring coal
摘要
申请公布号
US1911808(A)
申请公布日期
1933.05.30
申请号
US19300498685
申请日期
1930.11.28
申请人
DELAWARE, LACKAWANNA & WESTERN COAL COMPANY
发明人
JR. ERNEST VICTOR COLLINS,
分类号
C25D9/08
主分类号
C25D9/08
代理机构
代理人
主权项
地址
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