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发明名称
Ellipsograph
摘要
申请公布号
US1872505(A)
申请公布日期
1932.08.16
申请号
US19290358957
申请日期
1929.04.29
申请人
ADOLPH RONNING
发明人
RONNING ADOLPH
分类号
B43L11/045
主分类号
B43L11/045
代理机构
代理人
主权项
地址
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