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The ornamental design for the head portion of an electric toothbrush, as shown and described.
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FIG. 1 is an enlarged, perspective view of a head portion of an electric toothbrush showing our new design;
FIG. 2 is a top view thereof;
FIG. 3 is an enlarged perspective view of a head portion of an electric toothbrush showing a second embodiment of our new design; and,
FIG. 4 is a top view of FIG. 3.
The dashed lines shown in the figures represent environmental subject matter and form no part of the claimed design. The dotted lines shown in the figures represent the border between claimed subject matter and unclaimed subject matter and form no part of the claimed design.
Nottingham, John R., Spirk, John W., Blaustein, Lawrence A., Osher, John
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