FIG. 1 is a front perspective view of a first embodiment of an appliance knob showing our new design;

FIG. 2 is a front elevational view of the appliance knob of FIG. 1;

FIG. 3 is a first side elevational view of the appliance knob of FIG. 1, with the second side elevational view being a mirror image of FIG. 3;

FIG. 4 is a top plan view of the appliance knob of FIG. 1;

FIG. 5 is a bottom plan view of the appliance knob of FIG. 1;

FIG. 6 is a front perspective view of a second embodiment of an appliance knob showing our new design;

FIG. 7 is a front elevational view of the appliance knob of FIG. 6;

FIG. 8 is a first side elevational view of the appliance knob of FIG. 6, with the second side elevational view being a mirror image of FIG. 6; and,

FIG. 9 is a top plan view of the appliance knob of FIG. 6.

The bottom plan view for the appliance knob of FIG. 6 is identical to the bottom plan view shown in FIG. 5 of the appliance knob of FIG. 1. The rear elevational views of the embodiment of FIG. 1 and the embodiment of FIG. 2 are not shown and form no part of the claimed design. The portion shown in broken lines is for illustrative purposes only and forms no part of the claimed design.