Improvements in card-index systems,申请号GB19540007377-传众专利搜索

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发明名称	Improvements in card-index systems
摘要
申请公布号	GB758756(A)	申请公布日期	1956.10.10
申请号	GB19540007377	申请日期	1954.03.13
申请人	ALBERT LOUIS PARSONS	发明人
分类号	B42F17/28	主分类号	B42F17/28
代理机构		代理人
主权项
地址

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