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发明名称
Drafting machine
摘要
申请公布号
US2289126(A)
申请公布日期
1942.07.07
申请号
US19390302504
申请日期
1939.11.02
申请人
KEUFFEL & ESSER COMPANY
发明人
KEUFFEL CARL W.;WILCOX PHILIP E.
分类号
B43L13/06
主分类号
B43L13/06
代理机构
代理人
主权项
地址
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