Ergonomic pen
FIG. 1 is a front elevational view of an ergonomic pen showing my new design; 
     FIG. 2 is a side elevational view; 
     FIG. 3 is a rear elevational view; 
     FIG. 4 is a side elevational view of the side opposite that shown in FIG. 2; and, 
     FIG. 5 is an exploded perspective view thereof.