We claim the ornamental design for an oven, as shown and described.
FIG. 1 is a front perspective view of an oven showing our new design;
FIG. 2 is a front view thereof;
FIG. 3 is a rear view thereof;
FIG. 4 is a left-side view thereof;
FIG. 5 is a right-side view thereof;
FIG. 6 is a top view thereof;
FIG. 7 is a bottom view thereof;
FIG. 8 is a cross-sectional view taken through line 8-8 of FIG. 2;
FIG. 9 is a cross-sectional view taken through line 9-9 of FIG. 2;
FIG. 10 is a cross-sectional perspective view taken through line 10-10 of FIG. 2; and,
FIG. 11 is an enlarged view of a portion defined by lines 11-11 of FIG. 10.
The evenly spaced dashed broken lines in the figures depict portions of the oven that form no part of the claimed design.
The dot-dot-dash broken lines in FIG. 11 surrounding portions of the claimed design that are illustrated in enlargements form no part of the claimed design.