Improvements in or relating to photographic elements,申请号GB19470020807-传众专利搜索

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发明名称	Improvements in or relating to photographic elements
摘要
申请公布号	GB626427(A)	申请公布日期	1949.07.14
申请号	GB19470020807	申请日期	1947.07.31
申请人	E. I. DUPONT DE NEMOURS AND COMPANY	发明人
分类号	G03C1/835	主分类号	G03C1/835
代理机构		代理人
主权项
地址

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