Dispositif de signalisation à fréquence audible,申请号FRD980185-传众专利搜索

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法人/股东/高管

发明名称	Dispositif de signalisation à fréquence audible
摘要
申请公布号	FR980185(A)	申请公布日期	1951.05.09
申请号	FRD980185	申请日期	1949.02.05
申请人	TELEFONAKTIEBOLAGET L M ERICSSON	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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