Card index drum,申请号GB19370016338-传众专利搜索

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发明名称	Card index drum
摘要
申请公布号	GB495886(A)	申请公布日期	1938.11.22
申请号	GB19370016338	申请日期	1937.06.12
申请人	CHARLES CHRISTOPHER GIBSON	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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