Apparatus and process for the manufacture of vacuum tube electrodes,申请号US19260112461-传众专利搜索

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发明名称	Apparatus and process for the manufacture of vacuum tube electrodes
摘要
申请公布号	US1809206(A)	申请公布日期	1931.06.09
申请号	US19260112461	申请日期	1926.05.29
申请人	RADIO CORPORATION	发明人	LOPPACKER ALBERT
分类号	B21D53/00;H01J19/38	主分类号	B21D53/00
代理机构		代理人
主权项
地址

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