Pen
FIG. 1 is a rear elevational view of a pen showing my new design; 
     FIG. 2 is a right side elevational view, the left side being a mirror image thereof; 
     FIG. 3 is a front elevational view thereof; 
     FIG. 4 is a top plan view thereof; and, 
     FIG. 5 is a bottom plan view thereof. 
     FIGS. 4 and 5 have been drawn to an enlarged scale with respect to FIGS. 1 through 3.