Improvements in or relating to sound reproducing or recording apparatus employing sound-record films,申请号GB19310012762-传众专利搜索

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发明名称	Improvements in or relating to sound reproducing or recording apparatus employing sound-record films
摘要
申请公布号	GB376868(A)	申请公布日期	1932.07.21
申请号	GB19310012762	申请日期	1931.04.30
申请人	FREDERICK BROWN	发明人
分类号	G11B15/34	主分类号	G11B15/34
代理机构		代理人
主权项
地址

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