A gaming machine with a visual display shows an array of symbols that includes one or more special symbols. During the play of the gaming machine, a bonus game may be triggered by the alignment of these special symbols. This bonus triggers interplay between the special symbols, which portray an action...http://www.google.co.uk/patents/US6786818?utm_source=gb-gplus-sharePatent US6786818 - Gaming machine with interacting symbols on symbol array
