The ornamental design for an earpiece, as shown and described.
FIG. 1 is a front right side perspective view of an embodiment of a left earpiece showing our new design;
FIG. 2 is a front view of the left earpiece of FIG. 1;
FIG. 3 is a rear view of the left earpiece of FIG. 1;
FIG. 4 is a left side view of the left earpiece of FIG. 1;
FIG. 5 is a right side view of the left earpiece of FIG. 1;
FIG. 6 is top view of the left earpiece of FIG. 1;
FIG. 7 is bottom view of the left earpiece of FIG. 1;
FIG. 8 is a rear view of the left earpiece of FIG. 1;
FIG. 9 is a left rear side perspective view of an embodiment of a right earpiece showing our new design;
FIG. 10 is a front view of the right earpiece of FIG. 9;
FIG. 11 is a rear view of the right earpiece of FIG. 9;
FIG. 12 is a right side view of the right earpiece of FIG. 9;
FIG. 13 is a left side view of the right earpiece of FIG. 9;
FIG. 14 is top view of the right earpiece of FIG. 9;
FIG. 15 is bottom view of the right earpiece of FIG. 9; and,
FIG. 16 is a rear view of the right earpiece of FIG. 9.
FIGS. 1-16 illustrate design features of the earpiece we have invented, and both the solid lines and the broken lines are intended to serve as a description of the invention. The broken lines merely represent portions of the earpiece that form no part of each claim.