We claim the ornamental design for a pen for electronic bulletin board, as shown.
FIG. 1 is a front/right-side/top perspective view of a pen for electronic bulletin board showing our new design;
FIG. 2 is a front-side elevational view thereof;
FIG. 3 is a rear-side elevational view thereof;
FIG. 4 is a left-side elevational view thereof;
FIG. 5 is a right-side elevational view thereof;
FIG. 6 is a top-side elevational view thereof; and,
FIG. 7 is a bottom-side elevational view thereof.
Features shown in broken lines are disclaimed and form no part of the claimed design.
This application incorporates by reference Korean Design Application No 30-2-12-0045067 filed on Sep. 18, 2012. All the material from the Korean Application which is essential to the claimed design is included in this application. It is understood that any material in the Korean Design Application which is not present in this application forms no part of the claimed design.