Improvements in and relating to optical viewing devices,申请号GB19490001098-传众专利搜索

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发明名称	Improvements in and relating to optical viewing devices
摘要
申请公布号	GB661194(A)	申请公布日期	1951.11.21
申请号	GB19490001098	申请日期	1949.01.14
申请人	AIR TRAINERS LIMITED;GEOFFREY MOFFAT HELLINGS	发明人
分类号	G02C7/10;G02C7/16	主分类号	G02C7/10
代理机构		代理人
主权项
地址

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