Automatic telephone system,申请号US19370154967-传众专利搜索

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发明名称	Automatic telephone system
摘要
申请公布号	US2187478(A)	申请公布日期	1940.01.16
申请号	US19370154967	申请日期	1937.07.22
申请人	SIEMENS & HALSKE AKTIENGESELLSCHAFT OF WERNERWERK	发明人	WOCHINGER EDUARD
分类号	H04Q3/58	主分类号	H04Q3/58
代理机构		代理人
主权项
地址

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