Pen

FIG. 1 is a first perspective view of a pen showing our new design;

FIG. 2 is a second perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a back view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a right side view thereof;

FIG. 7 is a top view thereof;

FIG. 8 is a bottom view thereof;

FIG. 9 is a perspective view of another state of the pen thereof; and,

FIG. 10 is an enlarged view of the selected portion 10 in FIG. 1 .

The dash-dash broken lines shown in the drawings depict portions of the pen that form no part of the claimed design. The dash-dot broken lines represent the bounds of the enlarged view and form no part of the claimed design.