Improvements in or relating to automatic or semi-automatic telephone systems,申请号GB19300018651-传众专利搜索

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发明名称	Improvements in or relating to automatic or semi-automatic telephone systems
摘要
申请公布号	GB357185(A)	申请公布日期	1931.09.18
申请号	GB19300018651	申请日期	1930.06.18
申请人	AUTOMATIC TELEPHONE MANUFACTURING COMPANY LIMITED;CHARLES EDMUND BEALE	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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