Coal cutting machine,申请号US19390267502-传众专利搜索

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发明名称	Coal cutting machine
摘要
申请公布号	US2200419(A)	申请公布日期	1940.05.14
申请号	US19390267502	申请日期	1939.04.12
申请人	FANNING HUBERT D;FANNING LOYD V	发明人	FANNING HUBERT D.;FANNING LOYD V.
分类号	E21C25/64	主分类号	E21C25/64
代理机构		代理人
主权项
地址

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