Automatic producing valve,申请号US19320640275-传众专利搜索

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发明名称	Automatic producing valve
摘要
申请公布号	US1892455(A)	申请公布日期	1932.12.27
申请号	US19320640275	申请日期	1932.10.29
申请人	AYERS BERNARD H	发明人	AYERS BERNARD H.
分类号	E21B43/12	主分类号	E21B43/12
代理机构		代理人
主权项
地址

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