Switching arrangement for automatic telephone systems,申请号US19300477730-传众专利搜索

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发明名称	Switching arrangement for automatic telephone systems
摘要
申请公布号	US1845604(A)	申请公布日期	1932.02.16
申请号	US19300477730	申请日期	1930.08.25
申请人	TELEFONAKTIEBOLAGET L. M. ERICSSON	发明人	JOHNSON KARL GEORG
分类号	F16H57/04;H04Q3/00	主分类号	F16H57/04
代理机构		代理人
主权项
地址

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