Vapor electric tube,申请号US19380202586-传众专利搜索

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发明名称	Vapor electric tube
摘要
申请公布号	US2159255(A)	申请公布日期	1939.05.23
申请号	US19380202586	申请日期	1938.04.18
申请人	CLARK RICHARD U	发明人	CLARK RICHARD U.
分类号	H01J17/56	主分类号	H01J17/56
代理机构		代理人
主权项
地址

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