Hole punching device and method,申请号US19520272359-传众专利搜索

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发明名称	Hole punching device and method
摘要
申请公布号	US2799340(A)	申请公布日期	1957.07.16
申请号	US19520272359	申请日期	1952.02.19
申请人	MASEMO CORPORATION	发明人	MUELLER OTTO
分类号	B21D28/24;B21D28/34	主分类号	B21D28/24
代理机构		代理人
主权项
地址

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