Improvements in or relating to telephone systems,申请号GB19300033579-传众专利搜索

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发明名称	Improvements in or relating to telephone systems
摘要
申请公布号	GB366594(A)	申请公布日期	1932.02.08
申请号	GB19300033579	申请日期	1930.11.07
申请人	AUTOMATIC TELEPHONE MANUFACTURING COMPANY LIMITED;FRANCIS TATLOCK BELAS;GEORGE THOMAS BAKER	发明人
分类号	H04Q3/42	主分类号	H04Q3/42
代理机构		代理人
主权项
地址

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