Improvements in draughtsmen's scales,申请号GB19450011638-传众专利搜索

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发明名称	Improvements in draughtsmen's scales
摘要
申请公布号	GB593096(A)	申请公布日期	1947.10.08
申请号	GB19450011638	申请日期	1945.05.07
申请人	DUNKLEY & DAVIDSON LIMITED;LEONARD BRUCE ARCHER	发明人
分类号	B43L7/00;G01B3/04	主分类号	B43L7/00
代理机构		代理人
主权项
地址

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