Electron emitting cathode and method of preparation,申请号US19350016260-传众专利搜索

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发明名称	Electron emitting cathode and method of preparation
摘要
申请公布号	US2115828(A)	申请公布日期	1938.05.03
申请号	US19350016260	申请日期	1935.04.13
申请人	BELL TELEPHONE LABORATORIES, INCORPORATED	发明人	JR. CHARLES H. PRESCOTT,
分类号	H01J1/14	主分类号	H01J1/14
代理机构		代理人
主权项
地址

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