Audio and high frequency amplifying tube,申请号US19250063482-传众专利搜索

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发明名称	Audio and high frequency amplifying tube
摘要
申请公布号	US1744653(A)	申请公布日期	1930.01.21
申请号	US19250063482	申请日期	1925.10.19
申请人	RADIO CORPORATION	发明人	LOEWE SIEGMUND
分类号	H01J7/44	主分类号	H01J7/44
代理机构		代理人
主权项
地址

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