发明名称 Step ladder device
摘要 A step ladder device for balancing and stabilizing a ladder upon most any surface. The step ladder device includes a ladder having pairs of side rails and rung members being attached to the pairs of side rails; and also includes a ladder support assembly having leg assemblies including leg support members being attached to bottom ends of the side rails, and also including leg members being adjustably attached to the leg support members, and further including feet members being pivotally attached to the leg members.
申请公布号 US6799660(B1) 申请公布日期 2004.10.05
申请号 US20020328905 申请日期 2002.12.26
申请人 CRAWFORD JAMES R. 发明人 CRAWFORD JAMES R.
分类号 E06C7/14;E06C7/42;E06C7/44;E06C7/46;(IPC1-7):E06C1/00;E04G5/02 主分类号 E06C7/14
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