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发明名称
Device for holding frames while mounting lenses
摘要
申请公布号
US2210360(A)
申请公布日期
1940.08.06
申请号
US19380215464
申请日期
1938.06.23
申请人
CALDWELL EVELYN D
发明人
CALDWELL EVELYN D.
分类号
G02C13/00
主分类号
G02C13/00
代理机构
代理人
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