Improvements relating to telephone systems,申请号GB19460035514-传众专利搜索

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发明名称	Improvements relating to telephone systems
摘要
申请公布号	GB626982(A)	申请公布日期	1949.07.25
申请号	GB19460035514	申请日期	1946.11.29
申请人	SIEMENS BROTHERS & CO. LIMITED;KENNETH ROBERT YATES;BERNARD ANTHONY HENSLER	发明人
分类号	H04Q3/00	主分类号	H04Q3/00
代理机构		代理人
主权项
地址

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