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经营范围
发明名称
LIGHT-RESTRICTING SPECTACLES
摘要
申请公布号
GB8903596(D0)
申请公布日期
1989.04.05
申请号
GB19890003596
申请日期
1989.02.16
申请人
JOHN HENRY HOLDINGS
发明人
分类号
G02C7/12
主分类号
G02C7/12
代理机构
代理人
主权项
地址
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