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The ornamental design for a headphone, as shown and described. |
FIG. 1 is a front perspective view of a headphone;
FIG. 2 is a reduced right side view;
FIG. 3 is a reduced left side view;
FIG. 4 is a further reduced rear view;
FIG. 5 is a further reduced front view;
FIG. 6 is a reduced top view thereof; and,
FIG. 7 is a reduced bottom view.
The indicia in FIGS. 1-3 is shown in broken lines for illustrative purposes only and forms no part of the claimed design.
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