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发明名称
Ellipsograph
摘要
申请公布号
US1876069(A)
申请公布日期
1932.09.06
申请号
US19320584657
申请日期
1932.01.04
申请人
O'BYRNE NATHAN W
发明人
O'BYRNE NATHAN W.
分类号
B43L11/05
主分类号
B43L11/05
代理机构
代理人
主权项
地址
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