A wearable electronic tag for displaying graphics and text images and for communicating with other similar tags. Each tag includes a visible, graphical display adapted to be worn by a user. The tag also includes a short range, substantially unidirectional electronic communication channel, such as an...http://www.google.co.uk/patents/US7538745?utm_source=gb-gplus-sharePatent US7538745 - Apparatus and method for enhancing face-to-face communication
