Circuit for locking service observing teletypewriter during supervisory signal reception,申请号US19450620607-传众专利搜索

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发明名称	Circuit for locking service observing teletypewriter during supervisory signal reception
摘要
申请公布号	US2424244(A)	申请公布日期	1947.07.22
申请号	US19450620607	申请日期	1945.10.05
申请人	BELL TELEPHONE LABORATORIES, INCORPORATED	发明人	MARSHALL TOLA A.
分类号	H04L12/04	主分类号	H04L12/04
代理机构		代理人
主权项
地址

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