Towel bar bracket

FIG. 1 is a top plan view of my new design for a towel bar bracket;

FIG. 2 is a front elevation view;

FIG. 3 is a bottom plan view;

FIG. 4 is a rear elevation view;

FIG. 5 is a perspective view;

FIG. 6 is a right side elevation view; and,

FIG. 7 is a left side elevation view.

The broken-line disclosure of a bar fragment in the views is for illustrative purposes only and forms no part of the claimed design.