Short focus lens at focal point of long focus lens,申请号US19590784573-传众专利搜索

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发明名称	Short focus lens at focal point of long focus lens
摘要
申请公布号	US3201631(A)	申请公布日期	1965.08.17
申请号	US19590784573	申请日期	1959.01.02
申请人	HIGH VOLTAGE ENGINEERING CORPORATION	发明人	GALE ALFRED J.;NYGARD JOHN C.
分类号	H01J35/14	主分类号	H01J35/14
代理机构		代理人
主权项
地址

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