Improvements relating to the measurement of the optical density of photographic films,申请号GB19360035619-传众专利搜索

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发明名称	Improvements relating to the measurement of the optical density of photographic films
摘要
申请公布号	GB487945(A)	申请公布日期	1938.06.29
申请号	GB19360035619	申请日期	1936.12.29
申请人	NICHOLAS LANGER	发明人
分类号	G01N21/86	主分类号	G01N21/86
代理机构		代理人
主权项
地址

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