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经营范围
发明名称
Improvements in and relating to spectacles
摘要
申请公布号
GB369355(A)
申请公布日期
1932.03.24
申请号
GB19310005770
申请日期
1931.02.24
申请人
KARL WILLMANN;OTTO MEITZNER
发明人
分类号
G02C5/06
主分类号
G02C5/06
代理机构
代理人
主权项
地址
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