FIG. 1 is a side, top, perspective view of the pen;
FIG. 2 is a left side view thereof, the right side view being a mirror image thereof;
FIG. 3 is a top view thereof;
FIG. 4 is a bottom view thereof;
FIG. 5 is a front view thereof; and,
FIG. 6 is a rear view thereof.
The broken lines shown in the figures are included for the purpose of illustrating environmental matter and form no part of the claimed design.