Register Booster Fan

FIG. 1 is a front, bottom, and right perspective view of a register booster fan, showing my new design;

FIG. 2 is a rear, top and left perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a right side view thereof;

FIG. 7 is a top plan view thereof;

FIG. 8 is a bottom plan view thereof; and,

FIG. 9 is an enlarged view of portion 9 shown in FIG. 1 thereof.

The broken lines shown in the drawings illustrate portions of the register booster fan that form no part of the claimed design.

The dashed-dot lines form the boundary of the enlarged portion views of FIG. 9 shown in FIG. 1 and form no part of the claimed design.