Improvements relating to holder frames for photographic material,申请号GB19500004316-传众专利搜索

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发明名称	Improvements relating to holder frames for photographic material
摘要
申请公布号	GB667325(A)	申请公布日期	1952.02.27
申请号	GB19500004316	申请日期	1950.02.20
申请人	GENERAL ELECTRIC X-RAY CORPORATION	发明人
分类号	G03B42/04	主分类号	G03B42/04
代理机构		代理人
主权项
地址

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