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发明名称
Instrument for drawing ellipses or the like
摘要
申请公布号
US2493229(A)
申请公布日期
1950.01.03
申请号
US19480046288
申请日期
1948.08.26
申请人
DIBRELL
发明人
DIBRELL JAMES W.;WHITE DOROTHY LEMMON
分类号
B43L11/04
主分类号
B43L11/04
代理机构
代理人
主权项
地址
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