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The ornamental design for an electric fan, as shown and described.
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FIG. 1 is the front view of the electric fan showing the new design,
FIG. 2 is the rear view thereof,
FIG. 3 is the left view thereof,
FIG. 4 is the right view thereof,
FIG. 5 is the top view thereof; and,
FIG. 6 is the perspective view thereof.
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| D937401, | May 11 2020 | E2 LIMITED | Tower fan |
| D945590, | May 23 2019 | E2 LIMITED | Tower fan |
| ER2763, | |||
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