A tag for use with an individual monitoring system. The tag is worn by an individual being monitored, preferably on the ankle or leg where it can be concealed by the clothing of the individual. The tag is fully self contained and sealed. The circuits of the tag periodically generate an identification...http://www.google.com/patents/US4885571?utm_source=gb-gplus-sharePatent US4885571 - Tag for use with personnel monitoring system
