Method and apparatus for making self-tapping screws,申请号US19340722078-传众专利搜索

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发明名称	Method and apparatus for making self-tapping screws
摘要
申请公布号	US2161610(A)	申请公布日期	1939.06.06
申请号	US19340722078	申请日期	1934.04.24
申请人	GENERAL ELECTRIC COMPANY	发明人	BOGGILD AXEL V.
分类号	B21H3/02;F16B25/00	主分类号	B21H3/02
代理机构		代理人
主权项
地址

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