Cathode ray device,申请号US19290409957-传众专利搜索

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发明名称	Cathode ray device
摘要
申请公布号	US1814805(A)	申请公布日期	1931.07.14
申请号	US19290409957	申请日期	1929.11.26
申请人	GENERAL ELECTRIC COMPANY	发明人	HITCHCOCK WILLIAM J.
分类号	H01J31/40	主分类号	H01J31/40
代理机构		代理人
主权项
地址

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