FIG. 1 is a perspective view of a pen according to a first embodiment showing my new design;
FIG. 2 is a front view thereof, a rear view being a mirror image;
FIG. 3 is a left side view thereof;
FIG. 4 is a right side view thereof;
FIG. 5 is a top view thereof;
FIG. 6 is a bottom view thereof;
FIG. 7 is a front view of a cap thereof, shown without the body for convenience; a rear view of the cap being a mirror image;
FIG. 8 is a left side view of the cap thereof;
FIG. 9 is a right side view of the cap thereof;
FIG. 10 is a top view of the cap thereof;
FIG. 11 is a bottom view of the cap thereof;
FIG. 12 is a front view of a body thereof, shown without the cap for convenience; a rear view of the body being a mirror image;
FIG. 13 is a left side view of the body thereof;
FIG. 14 is a right side view of the body thereof;
FIG. 15 is a top view of the body thereof;
FIG. 16 is a bottom view of the body thereof;
FIG. 17 is an exploded perspective view thereof;
FIG. 18 is a perspective view of a pen according to a second embodiment showing my new design;
FIG. 19 is a front view thereof, a rear view being a mirror image;
FIG. 20 is a left side view thereof;
FIG. 21 is a right side view thereof;
FIG. 22 is a top view thereof;
FIG. 23 is a bottom view thereof;
FIG. 24 is a front view of a cap thereof, shown without the body for convenience; a rear view of the cap being a mirror image;
FIG. 25 is a left side view of the cap thereof;
FIG. 26 is a right side view of the cap thereof;
FIG. 27 is a top view of the cap thereof;
FIG. 28 is a bottom view of the cap thereof;
FIG. 29 is a front view of a body thereof, shown without the cap for convenience; a rear view of the body being a mirror image, a top and bottom views of the body being identical to the front view,
FIG. 30 is a left side view of the body thereof;
FIG. 31 is a right side view of the body thereof; and,
FIG. 32 is an exploded perspective view thereof.
The broken lines showing the inside in FIG. 9 are included for the purpose of showing a portion of the pen that forms no part of the claimed design.