The ornamental design for a heater, as shown and described.
FIG. 1 is a top perspective view of a heater showing our new design;
FIG. 2 is a bottom perspective view thereof;
FIG. 3 is a first side view thereof, where the side view opposite the view of FIG. 3 is identical to FIG. 3;
FIG. 4 is a second side view thereof, where the side view opposite the view of FIG. 4 is identical to FIG. 4;
FIG. 5 is a top plan view thereof; and,
FIG. 6 is a bottom plan view thereof, opposite the view of FIG. 5.
The evenly spaced broken lines depict portions of the heater that form no part of the claimed design; the dash-dot broken lines define the boundary of the claimed design and form no part thereof.
CORRECTIVE ASSIGNMENT TO CORRECT THE COMMA OF THE ASSIGNEE NAME PREVIOUSLY RECORDED AT REEL: 059662 FRAME: 0936 ASSIGNOR S HEREBY CONFIRMS THE ASSGINMENT