Expendable sealing plug,申请号US19590843551-传众专利搜索

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发明名称	Expendable sealing plug
摘要
申请公布号	US3042116(A)	申请公布日期	1962.07.03
申请号	US19590843551	申请日期	1959.09.30
申请人	OTIS ENGINEERING CORPORATION	发明人	SHARP FRANK W.;JR. ERSKIN L. MEDFORD,
分类号	E21B33/12	主分类号	E21B33/12
代理机构		代理人
主权项
地址

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