Chair backrest

Su September 30, 2

Patent Grant D577521

U.S. patent number D577,521 [Application Number D/317,181] was granted by the patent office on 2008-09-30 for chair backrest. Invention is credited to Tung-Hua Su.


United States Patent D577,521
Su September 30, 2008

Chair backrest

Claims

CLAIM The ornamental design for a chair backrest, as shown and described.
Inventors: Su; Tung-Hua (Kuwi Jen Hsiang, Tainan Hsien, TW)
Appl. No.: D/317,181
Filed: April 23, 2008

Current U.S. Class: D6/716.4; D6/366
Current International Class: 0601
Field of Search: ;D6/334-336,364,365,366,367,369,379,380,500-502 ;297/284.4,300.2,411.27,411.36,452.29,452.46,452.64

References Cited [Referenced By]

U.S. Patent Documents
D417792 December 1999 Hansen et al.
D456159 April 2002 Ball et al.
D456650 May 2002 Ball et al.
D457023 May 2002 Ball et al.
D471042 March 2003 Schmitz et al.
D471370 March 2003 Schmitz et al.
D490994 June 2004 Schmitz et al.
D494792 August 2004 Schmitz et al.
D506893 July 2005 Hsien
D544720 June 2007 Berbegal Perez
Primary Examiner: De; Mimosa
Attorney, Agent or Firm: Shia; Banger

Description



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.

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