Electron emissive cathode,申请号US19450595309-传众专利搜索

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发明名称	Electron emissive cathode
摘要
申请公布号	US2433821(A)	申请公布日期	1947.12.30
申请号	US19450595309	申请日期	1945.05.23
申请人	SYLVANIA ELECTRIC PRODUCTS INC.	发明人	TOORKS WILLIAM P.
分类号	H01J9/04	主分类号	H01J9/04
代理机构		代理人
主权项
地址

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