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发明名称
Magnifying device
摘要
申请公布号
US1925393(A)
申请公布日期
1933.09.05
申请号
US19320642800
申请日期
1932.11.15
申请人
LEHMAN EDWIN L
发明人
LEHMAN EDWIN L.
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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