An improvement in letter cards,申请号GB19370018304-传众专利搜索

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发明名称	An improvement in letter cards
摘要
申请公布号	GB498748(A)	申请公布日期	1939.01.09
申请号	GB19370018304	申请日期	1937.07.01
申请人	LIONEL DAY	发明人
分类号	B42D15/08	主分类号	B42D15/08
代理机构		代理人
主权项
地址

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