Improvements relating to sound transmission systems,申请号GB19580041976-传众专利搜索

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发明名称	Improvements relating to sound transmission systems
摘要
申请公布号	GB947371(A)	申请公布日期	1964.01.22
申请号	GB19580041976	申请日期	1958.12.30
申请人	ELECTRIC & MUSICAL INDUSTRIES LIMITED	发明人	PERCIVAL WILLIAM SPENCER
分类号	H04S3/00	主分类号	H04S3/00
代理机构		代理人
主权项
地址

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