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 of the electric motor shown in FIG. 1;
FIG. 3 is a right side elevation view of the electric motor shown in FIG. 1;
FIG. 4 is a left side elevation view of the electric motor shown in FIG. 1;
FIG. 5 is a top plan view of the electric motor shown in FIG. 1;
FIG. 6 is a bottom plan view of the electric motor shown in FIG. 1;
FIG. 7 is a front perspective view of the electric motor shown in FIG. 1; and,
FIG. 8 is a rear perspective view of the electric motor shown in FIG. 1.
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.