Improvements in or relating to card indexes,申请号GB19570001918-传众专利搜索

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发明名称	Improvements in or relating to card indexes
摘要
申请公布号	GB802139(A)	申请公布日期	1958.10.01
申请号	GB19570001918	申请日期	1957.01.18
申请人	STANDARD TELEPHONES AND CABLES LIMITED	发明人
分类号	G06K21/02	主分类号	G06K21/02
代理机构		代理人
主权项
地址

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