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发明名称
Combined perpetual calendar and file
摘要
申请公布号
USD308224(S1)
申请公布日期
1990.05.29
申请号
US06/758867
申请日期
1985.07.25
申请人
发明人
分类号
主分类号
代理机构
代理人
主权项
地址
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