We claim the ornamental design for an incense burner, as shown and described.
FIG. 1 is a perspective view of an incense burner;
FIG. 2 is a side view of the incense burner of FIG. 1;
FIG. 3 is a side view of the incense burner of FIG. 1 opposite to the side of FIG. 2;
FIG. 4 is a top view of the incense burner of FIG. 1;
FIG. 5 is a bottom view of the incense burner of FIG. 1;
FIG. 6 is an end view of the incense burner of FIG. 1; and,
FIG. 7 is an end view of the incense burner of FIG. 1 opposite to the end of FIG. 6.
The incense burner is shown with a symbolic break in its length. The appearance of any portion of the article between the break lines forms no part of the claimed design.
The features shown in broken lines depict environmental subject matter only and form no part of the claimed design.