Chair back

FIG. 1 is a front perspective view of a chair back of the present disclosure;

FIG. 2 is a rear perspective view of the chair back shown in FIG. 1 ;

FIG. 3 is a front elevational view of the chair back shown in FIG. 1 ;

FIG. 4 is a rear elevational view of the chair back shown in FIG. 1 ;

FIG. 5 is a left-side elevational view of the chair back shown in FIG. 1 ;

FIG. 6 is a right-side elevational view of the chair back shown in FIG. 1 ;

FIG. 7 is a top plan view of the chair back shown in FIG. 1 ;

FIG. 8 is a bottom plan view of the chair back shown in FIG. 1 ; and,

FIG. 9 is an enlarged view of the encircled portion identified as 9 in FIG. 2 .

The evenly spaced broken lines shown in the drawings are for the purpose of illustrating portions of the chair back that form no part of the claimed design. The dot-dash broken lines shown in FIGS. 2 and 9 are for the purpose of illustrating the boundary of the enlarged view and form no part of the claimed design.