Repeater for telephone systems,申请号US19410391600-传众专利搜索

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发明名称	Repeater for telephone systems
摘要
申请公布号	US2259788(A)	申请公布日期	1941.10.21
申请号	US19410391600	申请日期	1941.05.02
申请人	ADLER LEE E	发明人	ADLER LEE E.
分类号	H04B3/40;H04M1/02	主分类号	H04B3/40
代理机构		代理人
主权项
地址

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