The ornamental design for a door handle, as shown and described.
The file of this patent contains at least one drawing/photograph executed in color. Copies of this patent with color drawing(s)/photograph(s) will be provided by the Office upon request and payment of the necessary fee.
1. Door handle
1.1 is a top right perspective view of a door handle;
1.2 is a top right perspective view of a door handle in an alternative condition of use thereof;
1.3 is a top right perspective view of a door handle in an alternative condition of use thereof;
1.4 is a top right perspective view of a door handle in an alternative condition of use thereof;
1.5 is a top view thereof;
1.6 is a bottom view thereof; and
1.7 is a is a front view thereof.
The handle changes colours at different points in time, while the product is in use, in order to enable/deny access to the user.