Carrier-wave telephone system,申请号US19520267855-传众专利搜索

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发明名称	Carrier-wave telephone system
摘要
申请公布号	US2790029(A)	申请公布日期	1957.04.23
申请号	US19520267855	申请日期	1952.01.23
申请人	NORTH AMERICAN PHILIPS COMPANY, INC.	发明人	HANSEN HENDRIK NICOLAAS
分类号	H04J1/06	主分类号	H04J1/06
代理机构		代理人
主权项
地址

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