Improvements in or relating to drawing instruments,申请号GB19460025506-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	GB616080(A)	申请公布日期	1949.01.17
申请号	GB19460025506	申请日期	1946.08.26
申请人	ALLAN LESLIE SOMERVILLE	发明人
分类号	B43L13/14	主分类号	B43L13/14
代理机构		代理人
主权项
地址

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