Improvements in multiplex telephony and the like,申请号GB19370006080-传众专利搜索

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发明名称	Improvements in multiplex telephony and the like
摘要
申请公布号	GB475239(A)	申请公布日期	1937.11.16
申请号	GB19370006080	申请日期	1937.03.01
申请人	FRANCOIS CHARLES PIERRE HENROTEAU	发明人
分类号	H01J29/00;H04J3/18	主分类号	H01J29/00
代理机构		代理人
主权项
地址

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