A symbol display apparatus for game machine includes aligned plural reel units. Each of the reel units has double reel structure composed of an outer reel and an inner reel. Of two half symbols made by dividing a single complete symbol, one half symbol is disposed in a periphery of the inner reel, and...http://www.google.ca/patents/US6880826?utm_source=gb-gplus-sharePatent US6880826 - Symbol display apparatus for game machine
