Screen pipe with fragile lining,申请号US19390294266-传众专利搜索

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发明名称	Screen pipe with fragile lining
摘要
申请公布号	US2224630(A)	申请公布日期	1940.12.10
申请号	US19390294266	申请日期	1939.09.11
申请人	SOCONY-VACUUM OIL COMPANY, INCORPORATED	发明人	DEAN CALVIN J.;CARTER FRANK B.
分类号	E21B43/08	主分类号	E21B43/08
代理机构		代理人
主权项
地址

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