CLAIM The ornamental design for a pen clip, as shown and described.
Description:
FIG. 1 is a front bottom side perspective view of a pen clip showing my new design, with the phantom lines depicting environmental structure and forming no part of the claimed design;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a right side elevational view thereof which is a mirror image of the left side thereof; and,
