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发明名称
PERPETUAL CALENDARS
摘要
申请公布号
IL89598(A)
申请公布日期
1991.11.21
申请号
IL19890089598
申请日期
1989.03.14
申请人
RALPH HABER HOYECK
发明人
分类号
G09D3/08;G09D3/04;G09D3/10;G09F3/10;(IPC1-7):B42D15/00;G09D3/00
主分类号
G09D3/08
代理机构
代理人
主权项
地址
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