Time zone telephone metering system,申请号US19480065467-传众专利搜索

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发明名称	Time zone telephone metering system
摘要
申请公布号	US2570239(A)	申请公布日期	1951.10.09
申请号	US19480065467	申请日期	1948.12.15
申请人	FEDERAL TELEPHONE AND RADIO CORPORATION	发明人	HORWITZ HENRY LEOPOLD
分类号	H04M15/10	主分类号	H04M15/10
代理机构		代理人
主权项
地址

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