Method for drilling bore holes,申请号US19600003973-传众专利搜索

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发明名称	Method for drilling bore holes
摘要
申请公布号	US3130798(A)	申请公布日期	1964.04.28
申请号	US19600003973	申请日期	1960.01.21
申请人	SCHRAMM, INC.	发明人	SCHRAMM HAROLD J.;GUSTAFSON ALFRED N.
分类号	C09K8/38;E21B21/14	主分类号	C09K8/38
代理机构		代理人
主权项
地址

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