Head portion of an electric toothbrush
US D457728 S1
The ornamental design for a head portion of an electric toothbrush, as shown and described.
FIG. 1 is an enlarged, perspective view of a head portion of an electric toothbrush showing our new design; and,
FIG. 2 is a top view thereof.
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.
|1||Bachrich, Toothbrushes, Patent Abstract of United Kingdom, 452,961 (Dec. 19, 1934) (Abstract only).|
|2||Bader, Review of Currently Available Battery-Operated Toothbrushes, Compend. Contin. Educ. Dent., vol. X111, No. 12, Dec. 1992, p. 1162, 1164-1169.|
|3||Christensen, Elektromechanische Zahnbürste, Patent Abstract of Germany, DE 9310480 (Oct. 21, 1993) (Abstract only).|
|4||Sgan-Cohen et al., One Month Evaluation of the Manually Rotating "Bio-Bright" Toothbrush for Clinical Safety and Efficacy, Journal article, Department of Community Dentistry, Jerusalem, Israel, p. 120-123.|
|5||Wallrath, Electric Toothbrush, Patent Abstract of Germany, DE 3406112 (Feb. 21, 1984) (Abstract only).|
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