Improvements relating to photographic diazo type processes,申请号GB19380031957-传众专利搜索

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发明名称	Improvements relating to photographic diazo type processes
摘要
申请公布号	GB520304(A)	申请公布日期	1940.04.19
申请号	GB19380031957	申请日期	1938.11.04
申请人	E. N. MASON & SONS LIMITED;DAVID JOHN NORMAN	发明人
分类号	G03C1/54	主分类号	G03C1/54
代理机构		代理人
主权项
地址

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