Telescopic step or rung ladders,申请号US19550511074-传众专利搜索

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发明名称	Telescopic step or rung ladders
摘要
申请公布号	US2827216(A)	申请公布日期	1958.03.18
申请号	US19550511074	申请日期	1955.05.25
申请人	NAPOLITANO LEONARD B	发明人	NAPOLITANO LEONARD B.
分类号	E06C1/12;E06C1/22	主分类号	E06C1/12
代理机构		代理人
主权项
地址

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