Installation de haut-parleur à changement de sens de conversation pour la transmission d'ordres ou avis,申请号FRD888179-传众专利搜索

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发明名称	Installation de haut-parleur à changement de sens de conversation pour la transmission d'ordres ou avis
摘要
申请公布号	FR888179(A)	申请公布日期	1943.12.06
申请号	FRD888179	申请日期	1942.10.05
申请人	LICENTIA PATENT-VERWALTUNGS-GESELLSCHAFT MIT BESCHRANKTER HAFTUNG	发明人
分类号	H04M9/00	主分类号	H04M9/00
代理机构		代理人
主权项
地址

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