Improvements in or relating to electrical sound reproducing apparatus,申请号GB19300004805-传众专利搜索

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发明名称	Improvements in or relating to electrical sound reproducing apparatus
摘要
申请公布号	GB349019(A)	申请公布日期	1931.05.12
申请号	GB19300004805	申请日期	1930.02.12
申请人	HEINRICH KONEMANN	发明人
分类号	H03G7/02	主分类号	H03G7/02
代理机构		代理人
主权项
地址

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