Improvements in or relating to photographic enlargers and optical projection apparatus,申请号GB19520032461-传众专利搜索

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发明名称	Improvements in or relating to photographic enlargers and optical projection apparatus
摘要
申请公布号	GB712167(A)	申请公布日期	1954.07.21
申请号	GB19520032461	申请日期	1952.12.22
申请人	DE VERE (KENSINGTON) LIMITED	发明人	SPARKS ARTHUR LEONARD
分类号	G03B27/54	主分类号	G03B27/54
代理机构		代理人
主权项
地址

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