Improvements in optical projecting apparatus,申请号GB19290026470-传众专利搜索

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发明名称	Improvements in optical projecting apparatus
摘要
申请公布号	GB335038(A)	申请公布日期	1930.09.18
申请号	GB19290026470	申请日期	1929.08.30
申请人	FREDERIC JOHN CHESHIRE	发明人
分类号	G02B27/12	主分类号	G02B27/12
代理机构		代理人
主权项
地址

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