Optical apparatus for producing or reproducing sound,申请号GB19340018999-传众专利搜索

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发明名称	Optical apparatus for producing or reproducing sound
摘要
申请公布号	GB440721(A)	申请公布日期	1935.12.27
申请号	GB19340018999	申请日期	1934.06.27
申请人	FRANK MORSE ROBB	发明人
分类号	G10H3/06	主分类号	G10H3/06
代理机构		代理人
主权项
地址

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