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发明名称
Hand reading glass
摘要
申请公布号
US1940875(A)
申请公布日期
1933.12.26
申请号
US19300486621
申请日期
1930.10.06
申请人
HERMAN NEUWIRTH
发明人
NEUWIRTH HERMAN
分类号
G02B25/00
主分类号
G02B25/00
代理机构
代理人
主权项
地址
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