The RFID tag or other identifying device is used to store certain information identifying each play participant...http://www.google.com/patents/US6967566?utm_source=gb-gplus-sharePatent US6967566 - Live-action interactive adventure gameAdvanced Patent SearchPublication numberUS6967566 B2Publication typeGrantApplication numberUS 10/410,583Publication dateNov 22, 2005Filing dateApr 7, 2003Priority d