A portable game machine has an input unit and a display which are accommodated in a portable housing. Gauges are composed of a plurality of small areas sequentially arranged in predetermined directions. In the housing, a game processor is provided which selects one of a plurality of preset game elements...http://www.google.com/patents/US6540611?utm_source=gb-gplus-sharePatent US6540611 - Portable game machine and game-advancing method
