Expansible bit screw driver,申请号US19470792692-传众专利搜索

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发明名称	Expansible bit screw driver
摘要
申请公布号	US2556395(A)	申请公布日期	1951.06.12
申请号	US19470792692	申请日期	1947.12.19
申请人	MACLEAN CHARLES O	发明人	MACLEAN CHARLES O.
分类号	B25B23/10	主分类号	B25B23/10
代理机构		代理人
主权项
地址

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