Improvements relating to automatic telephone systems,申请号GB19440019077-传众专利搜索

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发明名称	Improvements relating to automatic telephone systems
摘要
申请公布号	GB580828(A)	申请公布日期	1946.09.20
申请号	GB19440019077	申请日期	1944.10.05
申请人	SIEMENS BROTHERS & CO. LIMITED;DOUGLAS PERCY LONG	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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