Zweidrahtzweiwegverstaerker fuer Fernsprechverbindungen mit Rueckkopplungssperrung,申请号DE1935K139249D-传众专利搜索

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发明名称	Zweidrahtzweiwegverstaerker fuer Fernsprechverbindungen mit Rueckkopplungssperrung
摘要
申请公布号	DE706697(C)	申请公布日期	1941.06.03
申请号	DE1935K139249D	申请日期	1935.09.11
申请人	DIPL.-ING. ROMAN KOLL	发明人
分类号	H04B3/20	主分类号	H04B3/20
代理机构		代理人
主权项
地址

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