Vacuum tube connection,申请号US19420437716-传众专利搜索

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发明名称	Vacuum tube connection
摘要
申请公布号	US2412987(A)	申请公布日期	1946.12.24
申请号	US19420437716	申请日期	1942.04.04
申请人	FEDERAL TELEPHONE AND RADIO CORPORATION	发明人	HOFFMAN ROSS B.
分类号	H01J19/50	主分类号	H01J19/50
代理机构		代理人
主权项
地址

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