Improvements in or relating to electro-acoustic devices,申请号GB19450021942-传众专利搜索

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发明名称	Improvements in or relating to electro-acoustic devices
摘要
申请公布号	GB616158(A)	申请公布日期	1949.01.18
申请号	GB19450021942	申请日期	1945.08.27
申请人	STANDARD TELEPHONES AND CABLES LIMITED;DENNIS EDWARD SKELTON	发明人
分类号	H04R7/16	主分类号	H04R7/16
代理机构		代理人
主权项
地址

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