Improvements in and relating to processes and devices for producing a light for photography, from light sources having a variety of light ray proportions,申请号GB19290027908-传众专利搜索

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发明名称	Improvements in and relating to processes and devices for producing a light for photography, from light sources having a variety of light ray proportions
摘要
申请公布号	GB341904(A)	申请公布日期	1931.01.13
申请号	GB19290027908	申请日期	1929.09.13
申请人	HERBERT BERTLING	发明人
分类号	G03B7/16	主分类号	G03B7/16
代理机构		代理人
主权项
地址

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