Chairback

FIG. 1 is a top upper perspective view of a first embodiment of a chairback;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a rear elevation view thereof;

FIG. 5 is a front elevation view thereof;

FIG. 6 is a right side elevation view thereof;

FIG. 7 is a left side elevation view thereof;

FIG. 8 is a rear lower perspective view thereof;

FIG. 9 is a top upper perspective view of a second embodiment of a chairback;

FIG. 10 is a top plan view thereof;

FIG. 11 is a bottom plan view thereof;

FIG. 12 is a rear elevation view thereof;

FIG. 13 is a front elevation view thereof;

FIG. 14 is a right side elevation view thereof;

FIG. 15 is a left side elevation view thereof; and,

FIG. 16 is a rear lower perspective view thereof.

The ornamental design which is claimed is shown in solid lines in the drawings. The uniform broken lines in FIGS. 9-16 illustrate environmental structure, while the dash-dot broken lines therein define bounds of the claimed design and form no part thereof.