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发明名称
Magnifying reading unit
摘要
申请公布号
US2453064(A)
申请公布日期
1948.11.02
申请号
US19450576178
申请日期
1945.02.05
申请人
CRESSATY GEORGE M
发明人
CRESSATY GEORGE M.
分类号
G02B27/02
主分类号
G02B27/02
代理机构
代理人
主权项
地址
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