Improvements in eye-training apparatus,申请号GB19300020442-传众专利搜索

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发明名称	Improvements in eye-training apparatus
摘要
申请公布号	GB346235(A)	申请公布日期	1931.04.09
申请号	GB19300020442	申请日期	1930.07.05
申请人	WALTER GREEN;ELLIOTT OPTICAL COMPANY LIMITED	发明人
分类号	A61H5/00	主分类号	A61H5/00
代理机构		代理人
主权项
地址

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