A band, including an extendable loop and worn around a user's arm, is used to apply a compressive force to an attacker's neck in self-defense. When the user positions the hand associated with the band against one side of the neck and grasps the extendable loop from the other side of the neck with the...http://www.google.es/patents/US6687916?utm_source=gb-gplus-sharePatente US6687916 - Defense band and method of self defense
