An improved optical toy,申请号GB19440018654-传众专利搜索

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发明名称	An improved optical toy
摘要
申请公布号	GB581650(A)	申请公布日期	1946.10.21
申请号	GB19440018654	申请日期	1944.09.29
申请人	CECIL BATHURST	发明人
分类号	G02B27/06	主分类号	G02B27/06
代理机构		代理人
主权项
地址

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