Automatic electronic switching by time delay signal for telephone systems,申请号US19500162520-传众专利搜索

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发明名称	Automatic electronic switching by time delay signal for telephone systems
摘要
申请公布号	US2596989(A)	申请公布日期	1952.05.20
申请号	US19500162520	申请日期	1950.05.17
申请人	FEDERAL TELEPHONE AND RADIO CORPORATION	发明人	DELORAINE EDMOND M.;ADAMS PAUL R.
分类号	H04Q3/52;H04Q11/04	主分类号	H04Q3/52
代理机构		代理人
主权项
地址

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