Improvements in or relating to extending ladders,申请号GB19470008404-传众专利搜索

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发明名称	Improvements in or relating to extending ladders
摘要
申请公布号	GB624591(A)	申请公布日期	1949.06.13
申请号	GB19470008404	申请日期	1947.03.28
申请人	GRAVITY LADDERS LIMITED;FREDERICK WILLIAM RILEY	发明人
分类号	E06C1/32	主分类号	E06C1/32
代理机构		代理人
主权项
地址

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