Perforating device for index cards,申请号US19450573721-传众专利搜索

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法人/股东/高管

发明名称	Perforating device for index cards
摘要
申请公布号	US2403035(A)	申请公布日期	1946.07.02
申请号	US19450573721	申请日期	1945.01.20
申请人	WHITSON JOHN W	发明人	WHITSON JOHN W.
分类号	B26F1/36	主分类号	B26F1/36
代理机构		代理人
主权项
地址

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