Electrical frequency filter arrangement,申请号GB19390020472-传众专利搜索

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发明名称	Electrical frequency filter arrangement
摘要
申请公布号	GB548299(A)	申请公布日期	1942.10.06
申请号	GB19390020472	申请日期	1938.07.13
申请人	TELEFONAKTIEBOLAGET L.M. ERICSSON	发明人
分类号	H04J1/04	主分类号	H04J1/04
代理机构		代理人
主权项
地址

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