Folding fire-escape ladder,申请号US19410389723-传众专利搜索

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发明名称	Folding fire-escape ladder
摘要
申请公布号	US2317459(A)	申请公布日期	1943.04.27
申请号	US19410389723	申请日期	1941.04.22
申请人	HILLENBRAND CARL J	发明人	HILLENBRAND CARL J.
分类号	E06C9/14	主分类号	E06C9/14
代理机构		代理人
主权项
地址

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