Improvements in or relating to the production of positives from twocolour screen negatives,申请号GB19330010376-传众专利搜索

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发明名称	Improvements in or relating to the production of positives from twocolour screen negatives
摘要
申请公布号	GB416114(A)	申请公布日期	1934.09.13
申请号	GB19330010376	申请日期	1933.04.06
申请人	GEORGE SYDNEY WHITFIELD	发明人
分类号	G03C7/22	主分类号	G03C7/22
代理机构		代理人
主权项
地址

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