Improvements in or relating to spools for photographic roll films,申请号GB19390002640-传众专利搜索

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发明名称	Improvements in or relating to spools for photographic roll films
摘要
申请公布号	GB524282(A)	申请公布日期	1940.08.02
申请号	GB19390002640	申请日期	1939.01.25
申请人	ALBERT HEMMINGER	发明人
分类号	G03B17/30	主分类号	G03B17/30
代理机构		代理人
主权项
地址

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