Method and apparatus for mining and tunneling,申请号US19340758744-传众专利搜索

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法人/股东/高管

发明名称	Method and apparatus for mining and tunneling
摘要
申请公布号	US2229086(A)	申请公布日期	1941.01.21
申请号	US19340758744	申请日期	1934.12.22
申请人	SULLIVAN MACHINERY COMPANY	发明人	JOY JOSEPH FRANCIS
分类号	E21C31/10	主分类号	E21C31/10
代理机构		代理人
主权项
地址

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