FIG. 1 is a front, top, right side perspective view of one embodiment of a knob showing my new design;
FIG. 2 is a rear, bottom, left side perspective view of FIG. 1;
FIG. 3 is a front elevational view of FIG. 1;
FIG. 4 is a top plan view of FIG. 1;
FIG. 5 is a bottom plan view of FIG. 1;
FIG. 6 is a right side elevational view of FIG. 1;
FIG. 7 is a left side elevational view of FIG. 1;
FIG. 8 is a front, top, right side perspective view of another embodiment of a knob;
FIG. 9 is a rear, bottom, left side perspective view of FIG. 8;
FIG. 10 is a front elevational view of FIG. 8;
FIG. 11 is a top plan view of FIG. 8;
FIG. 12 is a bottom plan view of FIG. 8;
FIG. 13 is a right side elevational view of FIG. 8; and,
FIG. 14 is a left side elevational view of FIG. 8.
The broken lines in the drawing figures form no part of the claimed design.