We claim the ornamental design for an induction warmer, as shown and described.
FIG. 1 is a top front perspective view of an induction warmer with a circular shell and resting surface showing our new design;
FIG. 2 is a top view thereof;
FIG. 3 is a front elevation view thereof, the right, left, and rear side elevation views of the induction warmer with respect to the claimed subject matter are the same;
FIG. 4 is a bottom view thereof; and,
FIG. 5 is a side cross-sectional view of the induction warmer of FIG. 1, about section 5-5 of FIG. 3.
The ornamental design which is claimed is shown in solid lines in the drawings. Any broken or phantom lines in the drawings form no part of the claimed design.