Multiple-unit tube,申请号US19270187680-传众专利搜索

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发明名称	Multiple-unit tube
摘要
申请公布号	US1895254(A)	申请公布日期	1933.01.24
申请号	US19270187680	申请日期	1927.04.29
申请人	RADIO CORPORATION OF AMERICA	发明人	LOEWE SIEGMUND
分类号	H01J21/20	主分类号	H01J21/20
代理机构		代理人
主权项
地址

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