Improvements in or relating to sound recording devices,申请号GB19300011318-传众专利搜索

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发明名称	Improvements in or relating to sound recording devices
摘要
申请公布号	GB356722(A)	申请公布日期	1931.09.09
申请号	GB19300011318	申请日期	1930.04.09
申请人	EUGENE ALEXANDRE HUGUENARD	发明人
分类号	G11B3/00	主分类号	G11B3/00
代理机构		代理人
主权项
地址

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