Improvements in or relating to thermionic amplifying systems for use in sound reproducing apparatus,申请号GB19280038562-传众专利搜索

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发明名称	Improvements in or relating to thermionic amplifying systems for use in sound reproducing apparatus
摘要
申请公布号	GB303382(A)	申请公布日期	1930.03.20
申请号	GB19280038562	申请日期	1928.12.31
申请人	THE BRITISH THOMSON-HOUSTON COMPANY, LIMITED	发明人
分类号	H04B1/16	主分类号	H04B1/16
代理机构		代理人
主权项
地址

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