Flow control apparatus,申请号US19550489246-传众专利搜索

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发明名称	Flow control apparatus
摘要
申请公布号	US2869646(A)	申请公布日期	1959.01.20
申请号	US19550489246	申请日期	1955.02.18
申请人	RICHFIELD OIL CORPORATION	发明人	CHAMBERLAIN RICHARD O.;JR. CHARLES E. WAKEFIELD,
分类号	E21B34/06;E21B43/14;E21B43/25	主分类号	E21B34/06
代理机构		代理人
主权项
地址

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