The ornamental design for a displayattachment for door handle, as shown and described.
FIG. 1 is a front perspective view of a display attachment for door handle showing the new design;
FIG. 2 is a front view thereof;
FIG. 3 is a rear view thereof;
FIG. 4 is a right side view thereof;
FIG. 5 is a left side view thereof;
FIG. 6 is a top view thereof;
FIG. 7 is a bottom view thereof; and,
FIG. 8 is a rear perspective view thereof.
The display attachment for door handle is shown with broken lines in FIGS. 1-5 and 8 to indicate no specific length.
The broken lines within the bounds of the display attachment for door handle represent unclaimed portions of the design that form no part of the claimed design.