Improvements in or relating to public address systems,申请号GB19390000173-传众专利搜索

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发明名称	Improvements in or relating to public address systems
摘要
申请公布号	GB523543(A)	申请公布日期	1940.07.17
申请号	GB19390000173	申请日期	1939.01.03
申请人	STANDARD TELEPHONES AND CABLES LIMITED;STUART SEYMOUR HILL;LIONEL JOHN OUTRAM	发明人
分类号	H04R27/00	主分类号	H04R27/00
代理机构		代理人
主权项
地址

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