Electron discharge tube,申请号US19490107257-传众专利搜索

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发明名称	Electron discharge tube
摘要
申请公布号	US2557774(A)	申请公布日期	1951.06.19
申请号	US19490107257	申请日期	1949.07.28
申请人	HARTFORD NATIONAL BANK AND TRUST COMPANY	发明人	WARMOLTZ NICOLAAS
分类号	H01J13/34;H01J13/48	主分类号	H01J13/34
代理机构		代理人
主权项
地址

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