Pen

FIG. 1 is an exploded perspective view of a pen showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a left side elevational view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a front elevational view thereof without the cap;

FIG. 6 is a left side elevational view thereof without the cap;

FIG. 7 is a right side elevational view thereof without the cap;

FIG. 8 is a rear elevational view thereof without the cap;

FIG. 9 is a top plan view of thereof without the cap; and,

FIG. 10 is a bottom plan view thereof without the cap.

The broken lines shown in the drawings depict portions of the pen that form no part of the claimed design.