Improvements in or relating to electro-acoustic transducers,申请号GB19520015609-传众专利搜索

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发明名称	Improvements in or relating to electro-acoustic transducers
摘要
申请公布号	GB715517(A)	申请公布日期	1954.09.15
申请号	GB19520015609	申请日期	1952.06.20
申请人	STANDARD TELEPHONES AND CABLES LIMITED	发明人	ROBERTON JAMES SAMUEL PATERSON
分类号	H04R11/00	主分类号	H04R11/00
代理机构		代理人
主权项
地址

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