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发明名称
Graph plotting machine
摘要
申请公布号
US2651400(A)
申请公布日期
1953.09.08
申请号
US19500178712
申请日期
1950.08.10
申请人
YOUNG DON W;TRENHOLM JR JOHN B
发明人
YOUNG DON W.;JR. JOHN B. TRENHOLM,
分类号
B43L13/02
主分类号
B43L13/02
代理机构
代理人
主权项
地址
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