Improvements in or relating to electro-dynamic loudspeakers,申请号GB19370018620-传众专利搜索

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发明名称	Improvements in or relating to electro-dynamic loudspeakers
摘要
申请公布号	GB498470(A)	申请公布日期	1939.01.05
申请号	GB19370018620	申请日期	1937.07.05
申请人	TELEFUNKEN GESELLSCHAFT FUR DRAHTLOSE TELEGRAPHIE M.B.H.	发明人
分类号	H04R9/02	主分类号	H04R9/02
代理机构		代理人
主权项
地址

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