Process of making twist drills,申请号US19320623580-传众专利搜索

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发明名称	Process of making twist drills
摘要
申请公布号	US2034514(A)	申请公布日期	1936.03.17
申请号	US19320623580	申请日期	1932.07.20
申请人	ACE DRILL COMPANY	发明人	HAYDEN GEORGE D.;HAYDEN HOWARD A.
分类号	B23P15/32	主分类号	B23P15/32
代理机构		代理人
主权项
地址

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