Improvements relating to drawing boards,申请号GB19440003555-传众专利搜索

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发明名称	Improvements relating to drawing boards
摘要
申请公布号	GB571589(A)	申请公布日期	1945.08.30
申请号	GB19440003555	申请日期	1944.02.25
申请人	HOLMES BROTHERS (LONDON) LIMITED;THOMAS RICHARD PROCTOR	发明人
分类号	B43L13/04	主分类号	B43L13/04
代理机构		代理人
主权项
地址

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