The ornamental design for a design symbol for use on kitchenware, as shown and described.
FIG. 1 illustrates our design for a design symbol for use on kitchenware.
FIG. 2 shows the design of FIG. 1 as placed on the bottom of a bowl, the bowl being shown in dashed lines and forming no part of the design; and,
FIG. 3 illustrates the design of FIG. 1 placed on the bottom of a conventional dinner plate as seen in dashed lines, the dinner plate forming no part of the design.