Spacer for electron discharge devices,申请号US19380192744-传众专利搜索

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发明名称	Spacer for electron discharge devices
摘要
申请公布号	US2175707(A)	申请公布日期	1939.10.10
申请号	US19380192744	申请日期	1938.02.26
申请人	RADIO CORPORATION OF AMERICA	发明人	SHARDLOW LAWRENCE RUSSEL
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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