An improved optical toy,申请号GB19460009403-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	GB609967(A)	申请公布日期	1948.10.08
申请号	GB19460009403	申请日期	1946.03.27
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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