Thumb hole punch,申请号US19500165742-传众专利搜索

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发明名称	Thumb hole punch
摘要
申请公布号	US2716928(A)	申请公布日期	1955.09.06
申请号	US19500165742	申请日期	1950.06.02
申请人	HARRY KELLER	发明人	KELLER HARRY
分类号	B26F1/12	主分类号	B26F1/12
代理机构		代理人
主权项
地址

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