Improvements in impulse circuits particularly for use in automatic telephone systems,申请号GB19290014560-传众专利搜索

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发明名称	Improvements in impulse circuits particularly for use in automatic telephone systems
摘要
申请公布号	GB311412(A)	申请公布日期	1930.05.08
申请号	GB19290014560	申请日期	1929.05.09
申请人	TELEFONAKTIEBOLAGET L.M. ERICSSON	发明人
分类号	H04Q1/32	主分类号	H04Q1/32
代理机构		代理人
主权项
地址

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