Chair backrest

The ornamental design for a chair backrest, as shown.

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.

Patent	Priority	Assignee	Title
D593337,	Jan 12 2009		Chair
D597771,	Jan 28 2008	MILLERKNOLL, INC	Backrest
D641574,	May 29 2010		Chair backrest
D696055,	May 26 2009	STEELCASE, INC	Chair back
D696545,	May 26 2009	STEELCASE, INC	Rear surface of a chair back
D696546,	May 26 2009	STEELCASE, INC	Chair back
D823018,	Jul 21 2017	HOMY CASA LIMITED	Chair
D905991,	May 27 2019		Chair
D911054,	Jun 21 2019	NINGBO MEIYING HOUSEHOLD GROUP CO , LTD	Office chair

Patent	Priority	Assignee	Title
D417792,	Apr 29 1998	Klober GmbH	Office chair
D456159,	May 25 2000	Steelcase Development Corporation	Chair
D456650,	May 25 2000	Steelcase Inc	Chair component
D457023,	May 25 2000	Steelcase Inc	Chair component
D471042,	Feb 13 2002	HERMAN MILLER, INC	Back for a seating structure
D471370,	Feb 13 2002	HERMAN MILLER, INC	Task chair
D490994,	Oct 15 2002	HERMAN MILLER, INC	Task chair
D494792,	Oct 15 2002	HERMAN MILLER, INC	Back for a seating structure
D506893,	Apr 28 2004		Chair back
D544720,	Apr 06 2006		Chair

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