The ornamental design for an eardeviceattachmentbracket, as shown and described.
FIG. 1 is a front perspective view of an ear device attachment bracket according to our 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 bottom view thereof; and,
FIG. 7 is a top view thereof.
The ear device attachment bracket of this design is configured to be attached to any earring or any other ear device for attachment to the ear of a user.