Improvements relating to sound and picture films,申请号GB19300019950-传众专利搜索

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发明名称	Improvements relating to sound and picture films
摘要
申请公布号	GB354941(A)	申请公布日期	1931.08.20
申请号	GB19300019950	申请日期	1930.07.01
申请人	I.G. FARBENINDUSTRIE AKTIENGESELLSCHAFT	发明人
分类号	G03B17/24;G03B31/00	主分类号	G03B17/24
代理机构		代理人
主权项
地址

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