Flow control head,申请号US19290413284-传众专利搜索

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发明名称	Flow control head
摘要
申请公布号	US1870590(A)	申请公布日期	1932.08.09
申请号	US19290413284	申请日期	1929.12.11
申请人	JOHN GRANT	发明人	SANTIAGO JAMES J.
分类号	E21B33/03	主分类号	E21B33/03
代理机构		代理人
主权项
地址

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