Improvements in switching devices comprising switch steps with primary and secondary selectors for automatic telephone systems,申请号GB19470019928-传众专利搜索

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发明名称	Improvements in switching devices comprising switch steps with primary and secondary selectors for automatic telephone systems
摘要
申请公布号	GB635727(A)	申请公布日期	1950.04.12
申请号	GB19470019928	申请日期	1947.07.24
申请人	TELEFONAKTIEBOLAGET L. M. ERICSSON	发明人
分类号	H04Q3/00	主分类号	H04Q3/00
代理机构		代理人
主权项
地址

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