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发明名称
Ellipsograph
摘要
申请公布号
US2670540(A)
申请公布日期
1954.03.02
申请号
US19520328422
申请日期
1952.12.29
申请人
RANDLES ARTHUR E
发明人
RANDLES ARTHUR E.
分类号
B43L11/055
主分类号
B43L11/055
代理机构
代理人
主权项
地址
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