Knurled piercing punch,申请号US19560568475-传众专利搜索

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发明名称	Knurled piercing punch
摘要
申请公布号	US2927492(A)	申请公布日期	1960.03.08
申请号	US19560568475	申请日期	1956.02.29
申请人	PORTER WALTER G	发明人	PORTER WALTER G.
分类号	B21D28/34	主分类号	B21D28/34
代理机构		代理人
主权项
地址

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