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LpComputer software delivery systemUS64358794 May 199920 Aug 2002Andreas UnsickerMethod and device for checking the correctness of answers to quiz questions over the media and in events, especially television and radioUS6468159 *18 Aug 200022 Oct 2002Cariocas, Inc.System and method for enhanced online transactions using shopping gamesUS64810129 Dec 199912 Nov 2002Diva Systems CorporationPicture-in
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