Bit for drilling noncircular holes,申请号US19480025815-传众专利搜索

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发明名称	Bit for drilling noncircular holes
摘要
申请公布号	US2586084(A)	申请公布日期	1952.02.19
申请号	US19480025815	申请日期	1948.05.08
申请人	R. L. NELSON	发明人	POWELL SAMMY ROE
分类号	B23B51/00;B23Q27/00;E21B7/00	主分类号	B23B51/00
代理机构		代理人
主权项
地址

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