Improvements in or relating to visible indicators for record sheets,申请号GB19470023073-传众专利搜索

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发明名称	Improvements in or relating to visible indicators for record sheets
摘要
申请公布号	GB641664(A)	申请公布日期	1950.08.16
申请号	GB19470023073	申请日期	1947.08.20
申请人	ARTHUR IVAR APPLETON	发明人
分类号	B42F17/00	主分类号	B42F17/00
代理机构		代理人
主权项
地址

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