Means for offshore drilling,申请号US19580764615-传众专利搜索

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发明名称	Means for offshore drilling
摘要
申请公布号	US3021909(A)	申请公布日期	1962.02.20
申请号	US19580764615	申请日期	1958.10.01
申请人	CALIFORNIA RESEARCH CORPORATION	发明人	POSTLEWAITE WILLIAM R.
分类号	E21B7/128	主分类号	E21B7/128
代理机构		代理人
主权项
地址

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