Procédé et dispositif de téléphonie secrète,申请号FRD893890-传众专利搜索

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发明名称	Procédé et dispositif de téléphonie secrète
摘要
申请公布号	FR893890(A)	申请公布日期	1944.11.08
申请号	FRD893890	申请日期	1940.02.16
申请人		发明人	FREY GASTON;GABRILOVITCH LEONID;PETIT STANISLAS
分类号	H04K1/02	主分类号	H04K1/02
代理机构		代理人
主权项
地址

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