Improvements in and relating to optical projection apparatus,申请号GB19390008305-传众专利搜索

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发明名称	Improvements in and relating to optical projection apparatus
摘要
申请公布号	GB526404(A)	申请公布日期	1940.09.17
申请号	GB19390008305	申请日期	1939.03.15
申请人	ANCIENS ETABLISSEMENTS BARBIER, BENARD & TURENNE	发明人
分类号	G03B21/00	主分类号	G03B21/00
代理机构		代理人
主权项
地址

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