Improvements in loud-speaking telephones or loud-speaker apparatus,申请号GB19320006710-传众专利搜索

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发明名称	Improvements in loud-speaking telephones or loud-speaker apparatus
摘要
申请公布号	GB392318(A)	申请公布日期	1933.05.18
申请号	GB19320006710	申请日期	1932.03.05
申请人	RADIOPHON G.M.B.H.	发明人
分类号	H04R11/02	主分类号	H04R11/02
代理机构		代理人
主权项
地址

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