Perfectionnement à la téléphonie secrète,申请号FRD796335-传众专利搜索

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发明名称	Perfectionnement à la téléphonie secrète
摘要
申请公布号	FR796335(A)	申请公布日期	1936.04.04
申请号	FRD796335	申请日期	1935.01.03
申请人		发明人	BEAUVAIS GEORGES-ARMAND
分类号	H04K1/00	主分类号	H04K1/00
代理机构		代理人
主权项
地址

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