Oil well cellar bracing bracket,申请号US19520280423-传众专利搜索

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发明名称	Oil well cellar bracing bracket
摘要
申请公布号	US2706004(A)	申请公布日期	1955.04.12
申请号	US19520280423	申请日期	1952.04.03
申请人	KATZENMAIER HENRY K	发明人	KATZENMAIER HENRY K.
分类号	E21B41/00	主分类号	E21B41/00
代理机构		代理人
主权项
地址

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