Perpetual calendars for day by day alterations,申请号GB19300030716-传众专利搜索

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发明名称	Perpetual calendars for day by day alterations
摘要
申请公布号	GB351362(A)	申请公布日期	1931.06.25
申请号	GB19300030716	申请日期	1930.10.14
申请人	WILLIAM JOHN LOCKETT	发明人
分类号	G09D3/08	主分类号	G09D3/08
代理机构		代理人
主权项
地址

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