Indirectly heated cathode,申请号US19310522841-传众专利搜索

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发明名称	Indirectly heated cathode
摘要
申请公布号	US1904261(A)	申请公布日期	1933.04.18
申请号	US19310522841	申请日期	1931.03.16
申请人	WESTERN ELECTRIC COMPANY, INCORPORATED	发明人	BEDFORD LESLIE HERBERT
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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