FIG. 1 is a perspective view showing my new design;

FIG. 2 is a front view of the hand-held spirometry device of FIG. 1;

FIG. 3 is a bottom view of the hand-held spirometry device of FIG. 1;

FIG. 4 is a rear view of the hand-held spirometry device of FIG. 1;

FIG. 5 is a top view of the hand-held spirometry device of FIG. 1;

FIG. 6 is a right side view of the hand-held spirometry device of FIG. 1;

FIG. 7 is a left side view of the hand-held spirometry device of FIG. 1;

FIG. 8 is a perspective view showing a second embodiment of my new design;

FIG. 9 is a front view of the hand-held spirometry device of FIG. 8;

FIG. 10 is a bottom view of the hand-held spirometry device of FIG. 8;

FIG. 11 is a rear view of the hand-held spirometry device of FIG. 8;

FIG. 12 is a top view of the hand-held spirometry device of FIG. 8;

FIG. 13 is a right side view of the hand-held spirometry device of FIG. 8; and,

FIG. 14 is a left side view of the hand-held spirometry device of FIG. 8.

The dashed lines are for illustrative purposes only and form no part of the claimed design.