Einrichtung zur Ausschaltung akustischer Rueckkopplung bei Anlagen mit Schallempfaengern und Schallsendern,申请号DE1950A003206-传众专利搜索

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发明名称	Einrichtung zur Ausschaltung akustischer Rueckkopplung bei Anlagen mit Schallempfaengern und Schallsendern
摘要
申请公布号	DE835903(C)	申请公布日期	1952.04.07
申请号	DE1950A003206	申请日期	1950.08.15
申请人	ALLGEMEINE TELEFON-FABRIK G.M.B.H.	发明人
分类号	H04M9/08	主分类号	H04M9/08
代理机构		代理人
主权项
地址

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