Pen

FIG. 1 is a front right perspective view of a pen showing my new design.

FIG. 2 is a front elevation view thereof.

FIG. 3 is a rear elevation view thereof.

FIG. 4 is a right side elevation view thereof, with the left side elevation view being a mirror image of the right side elevation view.

FIG. 5 is a top plan view thereof.

FIG. 6 is a bottom plan view thereof.

FIG. 7 is an enlarged top plan view thereof.

FIG. 8 is an enlarged bottom plan view thereof; and,

FIG. 9 is an exploded front right perspective view thereof.

The portions of the pen barrel and cap shown in broken lines form no part of the claimed design. The broken line circle inside the bottom end of the pen in FIGS. 6, 8, and 9 defines a boundary of the claimed design and forms no part thereof.