Improvements in or relating to sound record films,申请号GB19300025497-传众专利搜索

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发明名称	Improvements in or relating to sound record films
摘要
申请公布号	GB361438(A)	申请公布日期	1931.11.26
申请号	GB19300025497	申请日期	1930.08.26
申请人	ELECTRICAL RESEARCH PRODUCTS INC.	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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