Improvements in or relating to drawing instruments,申请号GB19490008307-传众专利搜索

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发明名称	Improvements in or relating to drawing instruments
摘要
申请公布号	GB669909(A)	申请公布日期	1952.04.09
申请号	GB19490008307	申请日期	1949.03.28
申请人	RICHARD DENNY MOLESWORTH	发明人
分类号	B43K23/004	主分类号	B43K23/004
代理机构		代理人
主权项
地址

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