Improvements relating to photographic contact printing apparatus,申请号GB19490030074-传众专利搜索

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发明名称	Improvements relating to photographic contact printing apparatus
摘要
申请公布号	GB660764(A)	申请公布日期	1951.11.14
申请号	GB19490030074	申请日期	1949.11.23
申请人	WARREN RANDOLPH PATIENCE;EDWIN SAMUEL PATIENCE	发明人
分类号	G03B27/22	主分类号	G03B27/22
代理机构		代理人
主权项
地址

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