Patent ID: 7220012

Claim:
A clip for pen can emit light comprising: a conducting-clamp ( 6 ) having a first conductor ( 61 ) and a second conductor ( 62 ) disposed separately, both top ends of the first, second conductors led into a ball pen ( 10 ) to contact with the anode and cathode of a set of batteries ( 3 ) the top end of the second conductor ( 62 ) is separated from the upper shaft of pen by an insulated cover ( 63 ), and at least an illuminating device ( 7 ) disposed on the clamp ( 6 ), at least an LED ( 73 ) with two metal leads ( 74 ), ( 75 ) extended out to contact said conductors ( 61 ) and ( 62 ), a switch disposed on the ball pen ( 10 ) can control one of circuits between the conductors and the set of batteries.