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发明名称
Vision aid
摘要
申请公布号
US2419917(A)
申请公布日期
1947.04.29
申请号
US19440546536
申请日期
1944.07.25
申请人
THOMAS BENTON SHORT
发明人
ROBESON EDNA G.
分类号
A61F9/02
主分类号
A61F9/02
代理机构
代理人
主权项
地址
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