Schaltungsanordnung zur Signalgabe über eine nach einer Telephonzentrale führende Übertragungsleitung mittels zweier gleichzeitig übermittelter Tonfrequenzen.,申请号CHD235721-传众专利搜索

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发明名称	Schaltungsanordnung zur Signalgabe über eine nach einer Telephonzentrale führende Übertragungsleitung mittels zweier gleichzeitig übermittelter Tonfrequenzen.
摘要
申请公布号	CH235721(A)	申请公布日期	1944.12.15
申请号	CHD235721	申请日期	1943.05.18
申请人	HASLER AG. WERKE FUER TELEPHONIE & PRAEZISIONSMECHANIK	发明人	HASLER AG. WERKE FUER TELEPHONIE & PRAEZISIONSMECHANIK
分类号	H04J1/14;H04Q1/446	主分类号	H04J1/14
代理机构		代理人
主权项
地址

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