FIG. 1 is a front perspective view of the design of the combination oven;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a right side elevational view with the left side being a mirror image thereof;
FIG. 4 is a top plan view thereof; and,
FIG. 5 is a bottom plan view thereof.
The broken lines shown are for illustrative purposes only and form no part of the design claimed.