An improved ellipsograph,申请号GB19480026910-传众专利搜索

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发明名称	An improved ellipsograph
摘要
申请公布号	GB648514(A)	申请公布日期	1951.01.03
申请号	GB19480026910	申请日期	1948.10.15
申请人	CHARLES BOWDEN	发明人
分类号	B43L11/045	主分类号	B43L11/045
代理机构		代理人
主权项
地址

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