Improvements in and relating to drawing instruments,申请号GB19490017836-传众专利搜索

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发明名称	Improvements in and relating to drawing instruments
摘要
申请公布号	GB662109(A)	申请公布日期	1951.11.28
申请号	GB19490017836	申请日期	1949.07.06
申请人	HILGER & WATTS LIMITED;ALFRED HERBERT SIDNEY THOMAS COMPTON	发明人
分类号	B43L9/20	主分类号	B43L9/20
代理机构		代理人
主权项
地址

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