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The ornamental design for a toothbrush, as shown and described. |
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FIG. 1 is a top plan view of a toothbrush showing my new design;
FIG. 2 is a bottom plan view thereof;
FIG. 3 is a side elevational view thereof;
FIG. 4 is an enlarged front end elevational view thereof; and
FIG. 5 is a rear end elevational end view thereof.
The side not shown comprises a mirror image of the side shown.
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