Improvements in or relating to thermionic amplifiers,申请号GB19300004597-传众专利搜索

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发明名称	Improvements in or relating to thermionic amplifiers
摘要
申请公布号	GB339269(A)	申请公布日期	1930.12.03
申请号	GB19300004597	申请日期	1929.09.03
申请人	BELL TELEPHONE LABORATORIES, INCORPORATED	发明人
分类号	H01J5/12	主分类号	H01J5/12
代理机构		代理人
主权项
地址

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