US D289306 S
Abstract available in
FIG. 1 is a top plan view of a trackball showing our new design;
FIG. 2 is an end elevational view of one end;
FIG. 3 is an end elevational view of the other end;
FIG. 4 is a bottom plan view;
FIG. 5 is a side elevational view of one side; and
FIG. 6 is a side elevational view of the other side.