Threshold responsive isolation for party telephone lines,申请号US19630329178-传众专利搜索

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发明名称	Threshold responsive isolation for party telephone lines
摘要
申请公布号	US3284575(A)	申请公布日期	1966.11.08
申请号	US19630329178	申请日期	1963.12.09
申请人	STROMBERG-CARLSON CORPORATION	发明人	HOWARD KAL W.
分类号	H04M1/70;H04Q5/02	主分类号	H04M1/70
代理机构		代理人
主权项
地址

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