Heater arrangement for indirectly heated cathodes,申请号US19300441743-传众专利搜索

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发明名称	Heater arrangement for indirectly heated cathodes
摘要
申请公布号	US1875222(A)	申请公布日期	1932.08.30
申请号	US19300441743	申请日期	1930.04.05
申请人	HENRY L. CROWLEY & CO. INC.	发明人	CROWLEY HENRY L.
分类号	H01J1/20	主分类号	H01J1/20
代理机构		代理人
主权项
地址

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