Systèmes de signalisation électriques par impulsions,申请号FRD971239-传众专利搜索

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发明名称	Systèmes de signalisation électriques par impulsions
摘要
申请公布号	FR971239(A)	申请公布日期	1951.01.15
申请号	FRD971239	申请日期	1940.02.03
申请人	LE MATERIEL TELEPHONIQUE	发明人
分类号	H04B14/02	主分类号	H04B14/02
代理机构		代理人
主权项
地址

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