We claim the ornamental design for an electric motor, as shown and described.
FIG. 1 is a front side elevation view of an electric motor embodying our design;
FIG. 2 is a rear side elevation view thereof;
FIG. 3 is a right side elevation view thereof;
FIG. 4 is a left side elevation view thereof;
FIG. 5 is a top plan view thereof;
FIG. 6 is a bottom plan view thereof;
FIG. 7 is a cross sectional view as taken along 7-7 line in FIG. 4, omitting the interior mechanism; and,
FIG. 8 is a perspective view of the electric motor.
The broken lines shown represent unclaimed subject matter and form no part of the claim. Where broken lines abut a claimed surface it is understood that those broken lines represent an unclaimed boundary between claimed and unclaimed surfaces. None of the broken lines form any part of the claimed design.