Improvements in or relating to films for use in sound recording,申请号GB19380008662-传众专利搜索

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发明名称	Improvements in or relating to films for use in sound recording
摘要
申请公布号	GB516279(A)	申请公布日期	1939.12.29
申请号	GB19380008662	申请日期	1938.03.21
申请人	KARL DANIEL	发明人
分类号	G03C5/14	主分类号	G03C5/14
代理机构		代理人
主权项
地址

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