Cement retaining shoe,申请号US19530400037-传众专利搜索

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发明名称	Cement retaining shoe
摘要
申请公布号	US2730177(A)	申请公布日期	1956.01.10
申请号	US19530400037	申请日期	1953.12.23
申请人	KLINE ALBERT K	发明人	KLINE ALBERT K.
分类号	E21B21/10	主分类号	E21B21/10
代理机构		代理人
主权项
地址

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