Improvements in or relating to vacuum tube circuits,申请号GB19300034313-传众专利搜索

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发明名称	Improvements in or relating to vacuum tube circuits
摘要
申请公布号	GB367022(A)	申请公布日期	1932.02.15
申请号	GB19300034313	申请日期	1930.11.14
申请人	ELECTRICAL RESEARCH PRODUCTS INC.	发明人
分类号	H03F3/22	主分类号	H03F3/22
代理机构		代理人
主权项
地址

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