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The ornamental design for a therapeutic back rest, as shown and described. |
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FIG. 1 is a perspective view of a therapeutic back rest, showing my new design;
FIG. 2 is a top plan view;
FIG. 3 is a side elevational view, the opposite side being a mirror image thereof;
FIG. 4 is a an end elevational view;
FIG. 5 is an end elevational view, showing the end opposite that shown in FIG. 4; and
FIG. 6 is a bottom plan view.
FIGS. 2-6 have been drawn to a reduced scale with respect to FIG. 1.
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