Core bit drilling tool,申请号US19560612504-传众专利搜索

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发明名称	Core bit drilling tool
摘要
申请公布号	US2870993(A)	申请公布日期	1959.01.27
申请号	US19560612504	申请日期	1956.09.27
申请人	KOEBEL DIAMOND TOOL CO.	发明人	JAHNKE DAVID H.
分类号	B23Q11/00;B28D1/04;E21B21/015;E21B25/00	主分类号	B23Q11/00
代理机构		代理人
主权项
地址

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