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发明名称
Menstrual period calculating device
摘要
申请公布号
US2725195(A)
申请公布日期
1955.11.29
申请号
US19540450167
申请日期
1954.08.16
申请人
RUEFF RENE H
发明人
RUEFF RENE H.
分类号
主分类号
代理机构
代理人
主权项
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