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发明名称
Geometrical instruments
摘要
申请公布号
US2782513(A)
申请公布日期
1957.02.26
申请号
US19560560765
申请日期
1956.01.23
申请人
BRANDT CORPORATION
发明人
BRANDT ROBERT C.
分类号
G06G1/04
主分类号
G06G1/04
代理机构
代理人
主权项
地址
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