Microwave oven

FIG. 1 is a top, front, and right side perspective view of a microwave oven showing our new design;

FIG. 2 is a front elevation view of our new design;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a right side elevation view thereof;

FIG. 5 is a left side elevation view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The details shown in broken lines in FIGS. 2-5 and 7 are for illustrative purposes only and form no part of the claimed design.