Unitary vacuum tube structure,申请号US19290378163-传众专利搜索

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发明名称	Unitary vacuum tube structure
摘要
申请公布号	US1960056(A)	申请公布日期	1934.05.22
申请号	US19290378163	申请日期	1929.07.13
申请人	ARCTURUS DEVELOPMENT COMPANY	发明人	KRAHL WALTER LOUIS
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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