Ladder extending device,申请号GB19890010371-传众专利搜索

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发明名称	Ladder extending device
摘要
申请公布号	GB2231081(A)	申请公布日期	1990.11.07
申请号	GB19890010371	申请日期	1989.05.05
申请人	JAMES RICHARD * READ	发明人	JAMES RICHARD * READ
分类号	E06C1/12	主分类号	E06C1/12
代理机构		代理人
主权项
地址

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