Signaling arrangement for telephone systems,申请号US19310545589-传众专利搜索

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发明名称	Signaling arrangement for telephone systems
摘要
申请公布号	US1862587(A)	申请公布日期	1932.06.14
申请号	US19310545589	申请日期	1931.06.19
申请人	AMERICAN TELEPHONE AND TELEGRAPH COMPANY	发明人	ALMQUIST MILTON L.
分类号	H04M11/06	主分类号	H04M11/06
代理机构		代理人
主权项
地址

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