Microwave oven

FIG. 1 is a front perspective view of a microwave oven showing our new design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a left side elevation view thereof;

FIG. 5 is a right side elevation view thereof;

FIG. 6 is a top view thereof;

FIG. 7 is a bottom view thereof; and,

FIG. 8 is an enlarged view of the encircled portion in FIG. 7 .

The broken lines immediately adjacent the shaded areas represent the boundaries of the claimed design, while all other broken lines are directed to environment; the broken lines form no part of the claimed design. The dot-dot-dash broken lines encircling portions of the claimed design in FIG. 7 that are illustrated in an enlargement in FIG. 8 form no part of the claimed design.