Procédé pour doubler le nombre des communications télégraphiques ou téléphoniques, avec ou sans fil, et dispositifs le réalisant,申请号FRD737941-传众专利搜索

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发明名称	Procédé pour doubler le nombre des communications télégraphiques ou téléphoniques, avec ou sans fil, et dispositifs le réalisant
摘要
申请公布号	FR737941(A)	申请公布日期	1932.12.19
申请号	FRD737941	申请日期	1931.09.25
申请人		发明人	LOTH WILLIAM ARTHUR;GIVELET ARMAND JOSEPH
分类号	H04J7/02;H04N7/04	主分类号	H04J7/02
代理机构		代理人
主权项
地址

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