Cathode-grid spacing means,申请号US19570665692-传众专利搜索

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发明名称	Cathode-grid spacing means
摘要
申请公布号	US2872609(A)	申请公布日期	1959.02.03
申请号	US19570665692	申请日期	1957.06.14
申请人	SYLVANIA ELECTRIC PRODUCTS INC.	发明人	WHEELER WILLIAM R.
分类号	H01J19/42	主分类号	H01J19/42
代理机构		代理人
主权项
地址

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