Improvements relating to sound-reproducing apparatus,申请号GB19530003740-传众专利搜索

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发明名称	Improvements relating to sound-reproducing apparatus
摘要
申请公布号	GB746952(A)	申请公布日期	1956.03.21
申请号	GB19530003740	申请日期	1953.02.10
申请人	STEVAN DRAGUTIN ZIVADINOVIC	发明人
分类号	H04R1/34	主分类号	H04R1/34
代理机构		代理人
主权项
地址

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