Improvements in electrical communication systems,申请号GB19440012547-传众专利搜索

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发明名称	Improvements in electrical communication systems
摘要
申请公布号	GB581218(A)	申请公布日期	1946.10.04
申请号	GB19440012547	申请日期	1944.06.30
申请人	WESTERN ELECTRIC COMPANY INCORPORATED	发明人
分类号	H04B3/04	主分类号	H04B3/04
代理机构		代理人
主权项
地址

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