Improvements in or relating to photographic enlarging or reducing apparatus,申请号GB19390011606-传众专利搜索

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发明名称	Improvements in or relating to photographic enlarging or reducing apparatus
摘要
申请公布号	GB527977(A)	申请公布日期	1940.10.21
申请号	GB19390011606	申请日期	1939.04.17
申请人	OPTIKOTECHNA, SPOLECNOST S R.O., PREROV	发明人
分类号	G03B27/36	主分类号	G03B27/36
代理机构		代理人
主权项
地址

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