There is described a multiple tag interrogation system (10) for simultaneously interrogating a plurality of tags (200, 210, 220) each including at least two interrogatable features (600, 610, 620) the system (10) comprising a receiving region (50) for receiving the tags (200, 210, 220), interrogating...http://www.google.fr/patents/US20040093187?utm_source=gb-gplus-shareBrevet US20040093187 - Multiple tag interrogation system
