Schaltungsanordnung zur Begrenzung der Gespraechsdauer fuer Fernsprechstellen mit Selbstbelastungseinrichtungen,申请号DE1937T048080D-传众专利搜索

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发明名称	Schaltungsanordnung zur Begrenzung der Gespraechsdauer fuer Fernsprechstellen mit Selbstbelastungseinrichtungen
摘要
申请公布号	DE673735(C)	申请公布日期	1939.03.29
申请号	DE1937T048080D	申请日期	1937.01.26
申请人	TELEPHON-APPARAT-FABRIK E. ZWIETUSCH & CO. G.M.B.H.	发明人	DOEHLE HINRICH
分类号	H04M3/12;H04M17/02	主分类号	H04M3/12
代理机构		代理人
主权项
地址

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