Improvements in or relating to photo-engraved plates and methods of forming the same,申请号GB19550025768-传众专利搜索

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发明名称	Improvements in or relating to photo-engraved plates and methods of forming the same
摘要
申请公布号	GB783477(A)	申请公布日期	1957.09.25
申请号	GB19550025768	申请日期	1955.09.08
申请人	THE YOUNGSTOWN ARC ENGRAVING COMPANY	发明人	GUTKNECHT WILLIAM JOHN
分类号	G03F7/00	主分类号	G03F7/00
代理机构		代理人
主权项
地址

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