Apparatus for making and mounting perfect screws,申请号US19470742417-传众专利搜索

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发明名称	Apparatus for making and mounting perfect screws
摘要
申请公布号	US2621451(A)	申请公布日期	1952.12.16
申请号	US19470742417	申请日期	1947.04.18
申请人	DONOVAN STRONG JOHN	发明人	STRONG JOHN DONOVAN
分类号	B24B19/02	主分类号	B24B19/02
代理机构		代理人
主权项
地址

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