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The ornamental design for a cordless telephone headset, as shown and described. |
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FIG. 1 is a right side rear perspective view of a cordless telephone headset showing my new design;
FIG. 2 is a rear elevation view;
FIG. 3 is a right side elevation view;
FIG. 4 is a left side elevation view;
FIG. 5 is a front elevation view;
FIG. 6 is a bottom plan view; and,
FIG. 7 is a top plan view.
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