Improvements in variable thermionic impedance networks,申请号GB19370030700-传众专利搜索

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发明名称	Improvements in variable thermionic impedance networks
摘要
申请公布号	GB505124(A)	申请公布日期	1939.05.05
申请号	GB19370030700	申请日期	1937.11.09
申请人	E. K. COLE LIMITED;GEOFFREY BRADFIELD	发明人
分类号	H03J7/04	主分类号	H03J7/04
代理机构		代理人
主权项
地址

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