Electron emitter for electron tubes,申请号US19490114958-传众专利搜索

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发明名称	Electron emitter for electron tubes
摘要
申请公布号	US2647067(A)	申请公布日期	1953.07.28
申请号	US19490114958	申请日期	1949.09.10
申请人	EITEL-MCCULLOUGH, INC.	发明人	WILLIAMS PAUL D.
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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