Nouveau dispositif de changement de fréquence et son application à la radiotéléphonie en service duplex,申请号FRD705431-传众专利搜索

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发明名称	Nouveau dispositif de changement de fréquence et son application à la radiotéléphonie en service duplex
摘要
申请公布号	FR705431(A)	申请公布日期	1931.06.08
申请号	FRD705431	申请日期	1930.08.09
申请人		发明人	SAYOUS YYES-PAUL-HENRI
分类号	H04B1/50	主分类号	H04B1/50
代理机构		代理人
主权项
地址

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