Improvements in or relating to spools for photographic films,申请号GB19300004570-传众专利搜索

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发明名称	Improvements in or relating to spools for photographic films
摘要
申请公布号	GB340442(A)	申请公布日期	1931.01.01
申请号	GB19300004570	申请日期	1930.02.11
申请人	THOMAS GEORGE BAXENDEN;JOHN ROBERT COLLYEAR	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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