The present invention provides an interactive, ongoing bonus game that operates at the same time as a base game of a gaming device and thereby enhances a player's award. The present invention provides one or more graduating multiplier or modifier displays, wherein the displays designate a position of...http://www.google.com.au/patents/US20020019255?utm_source=gb-gplus-sharePatent US20020019255 - Gaming device having multiple award enhancing levels
