Electron tube and the like,申请号US19400350313-传众专利搜索

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发明名称	Electron tube and the like
摘要
申请公布号	US2236036(A)	申请公布日期	1941.03.25
申请号	US19400350313	申请日期	1940.08.03
申请人	HYGRADE SYLVANIA CORPORATION	发明人	O'NEILL GEORGE D.
分类号	H01J19/52	主分类号	H01J19/52
代理机构		代理人
主权项
地址

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