A SEMI-PERPETUAL CALENDAR AND PUZZLE,申请号GB19890022798-传众专利搜索

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发明名称	A SEMI-PERPETUAL CALENDAR AND PUZZLE
摘要
申请公布号	GB8922798(D0)	申请公布日期	1989.11.22
申请号	GB19890022798	申请日期	1989.10.10
申请人	CROWTHER, PHILIP A T	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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