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Publication numberUSD540503 S1
Publication typeGrant
Application numberUS 29/244,982
Publication dateApr 10, 2007
Filing dateDec 16, 2005
Priority dateDec 16, 2005
Publication number244982, 29244982, US D540503 S1, US D540503S1, US-S1-D540503, USD540503 S1, USD540503S1
InventorsWai Kay Tsang
Original AssigneeUltrabright Limited
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Stair climbing wheel system
US D540503 S1
Abstract  available in
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  1. The ornamental design for stair climbing wheel system, as shown and described.

FIG. 1 is a perspective view of a stair climbing wheel system showing our new design;

FIG. 2 is a top view of the stair climbing wheel system, the bottom view, front side view, and rear view being identical to the top view, and thus are not shown; and,

FIG. 3 is a right side view of the stair climbing wheel system; the left side view being identical to the right side view and thus is not shown.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US7503567 *Apr 16, 2007Mar 17, 2009Frankie Thomas TAutomated wheelchair
U.S. ClassificationD34/28