Blow-out preventer,申请号US19340724295-传众专利搜索

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发明名称	Blow-out preventer
摘要
申请公布号	US2071197(A)	申请公布日期	1937.02.16
申请号	US19340724295	申请日期	1934.05.07
申请人	ERWIN BURNS;WICKERSHAM HARRY P	发明人	BURNS ERWIN;WICKERSHAM HARRY P.
分类号	E21B33/06	主分类号	E21B33/06
代理机构		代理人
主权项
地址

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