Improvements in and relating to optical systems,申请号GB19530031123-传众专利搜索

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发明名称	Improvements in and relating to optical systems
摘要
申请公布号	GB769916(A)	申请公布日期	1957.03.13
申请号	GB19530031123	申请日期	1953.11.10
申请人	AIR TRAINERS LIMITED	发明人	BELL ARTHUR STEWART
分类号	G03B21/20	主分类号	G03B21/20
代理机构		代理人
主权项
地址

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