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发明名称
Graphical instrument
摘要
申请公布号
US2867906(A)
申请公布日期
1959.01.13
申请号
US19540466032
申请日期
1954.11.01
申请人
KOUNG-SHIN LEE
发明人
LEE KOUNG-SHIN
分类号
B43L7/12
主分类号
B43L7/12
代理机构
代理人
主权项
地址
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