Electric perpetual calendar,申请号GB19610039208-传众专利搜索

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发明名称	Electric perpetual calendar
摘要
申请公布号	GB979420(A)	申请公布日期	1965.01.01
申请号	GB19610039208	申请日期	1961.11.02
申请人	GEORGE ERNEST DUNNING	发明人
分类号	G04C17/00	主分类号	G04C17/00
代理机构		代理人
主权项
地址

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