A system and method including a trading card and a recording and/or reproducing apparatus recording and/or reproducing subject-related data to/from the trading card, wherein the subject-related data comprises picture information characterizing a subject or reminding a user of the subject. The recording...http://www.google.com/patents/US6981646?utm_source=gb-gplus-sharePatent US6981646 - Chip embedded trading card, recording and/or reproducing apparatus therefor, and message building method
