The ornamental design for a door handle, as shown and described.
FIG. 1 is a left front perspective view of a door handle, according to the present invention.
FIG. 2 is a right front perspective view thereof.
FIG. 3 is a right rear perspective view thereof.
FIG. 4 is a left rear perspective view thereof.
FIG. 5 is a front view thereof.
FIG. 6 is a rear view thereof.
FIG. 7 is a left side view thereof.
FIG. 8 is a right side view thereof.
FIG. 9 is a top view thereof; and,
FIG. 10 is a perspective of the door handle shown in FIGS. 1-9 mounted in the interior of a vehicle, with the rest of the interior of the vehicle shown in de-emphasized and half-tone portions so as to illustrate environmental structure. These portions form no part of the claimed invention. More specifically, in FIG. 10, the inventive door handle is shown within the broken line, and any elements shown outside of the broken line form no part of the claimed invention, but are instead included to show environmental aspects thereof.