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Publication numberUSD540580 S1
Publication typeGrant
Application numberUS 29/251,017
Publication dateApr 17, 2007
Filing dateDec 31, 2005
Priority dateDec 31, 2005
Publication number251017, 29251017, US D540580 S1, US D540580S1, US-S1-D540580, USD540580 S1, USD540580S1
InventorsTung-Hua Su
Original AssigneeTung-Hua Su
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Chair backrest
US D540580 S1
Abstract  available in
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  1. The ornamental design for a chair backrest, as shown and described.

FIG. 1 is a perspective view of a chair backrest showing my new design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a left side elevation view thereof;

FIG. 5 is a right side elevation view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
USD673401 *Jun 12, 2012Jan 1, 2013Humanscale CorporationChair support structure
U.S. ClassificationD06/716.4, D06/366