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发明名称
Perpetual Calendar.
摘要
申请公布号
EP0136294(A4)
申请公布日期
1985.10.01
申请号
EP19840900696
申请日期
1984.02.16
申请人
KENNEDY, GEORGE
发明人
KENNEDY, GEORGE
分类号
G09B1/16;A63H33/06;G09D3/02;G09F7/14;(IPC1-7):G09D3/02;G09F7/00
主分类号
G09B1/16
代理机构
代理人
主权项
地址
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