# US 8,784,177 B2 · Gaming system and a method of gaming > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,784,177 B2 - Document ID: US8784177B2 - Status: Granted - Kind: B2 - Application number: 13/850,161 - Filed: 2013-03-25 - Published: 2013-10-31 - Granted: 2014-07-22 - Earliest claimed: 2007-06-28 - Assignees: Aristocrat Technologies Australia Pty Limited - Applicants: Martin Stephen Lyons; Robert Linley Muir - Inventors: Martin Stephen Lyons; Robert Linley Muir - Web page: https://patentgrep.com/patent/US8784177B2 ## CPC - G07F 17/34: depending on the stopping of moving members {in a mechanical slot machine}, e.g. "fruit" machines - G07F 17/3265: {Influencing the position of stopped moving members to achieve a winning arrangement, e.g. nudging, shuffling, holding} - G07F: COIN-FREED OR LIKE APPARATUS (coin sorting G07D3/00; coin testing G07D5/00; {handling coins or paper currencies apart from payment activated apparatus G07D; payment architectures, schemes or protocols G06Q20/00}) ## Abstract The present invention relates to a gaming system and to a method of gaming. A gaming system comprises a game controller arranged to randomly display several symbols from a predetermined set of symbols and to determine a game outcome such as a game win based on the displayed symbols. Such gaming systems may be implemented as a stepper machine provided with reels or a video machine displaying “virtual” reels. One or more reels generated in play of a base game may be stored for later use in subsequent games. In a subsequent game or games, the game controller may select the stored reel to substitute for a reel generated by the game, in order to improve the game outcome. For example, the game outcome may become a “win” from a “lose” outcome. Or it may result in an improved win outcome. The one or more reels may be stored depending upon a trigger condition generated in the base game. ## Claims ### Claim 1 A gaming system for playing a first game and a second game, the system comprising: a symbol selector configured to select a first plurality of subsets of symbols from a plurality of corresponding sets of symbols for the first game; an outcome generator configured to 1) determine an outcome of the first game based on the selected subsets of symbols, and 2) select, without input from a player, at least one of said selected subsets of symbols to be stored; a symbol store configured to store said at least one selected subsets of symbols in response to said first game outcome comprising at least one predefined symbol; and wherein said symbol selector is further configured to select a second plurality of subsets of symbols from said corresponding sets of symbols for the second game, and wherein said outcome generator is further configured to substitute said at least one selected subsets of symbols stored in the symbol store for at least one of said second subsets of symbols in response to said at least one selected subsets of symbols resulting in a more favourable win than said second subsets of symbols. ### Claim 2 (depends on 1) A gaming system in accordance with claim 1, further comprising a display configured to display said sets of symbols in a reel format having a plurality of reels, and wherein the stored said at least one selected subsets of symbols represents a stored reel. ### Claim 3 (depends on 1) A gaming system in accordance with claim 1, and wherein, when the outcome generator determines to substitute the stored at least one selected subsets of symbols for said at least one of said second subsets of symbols, symbols of the stored at least one selected subsets of symbols substitute corresponding symbols on said at least one of said second subsets of symbols. ### Claim 4 (depends on 1) A gaming system in accordance with claim 1, and wherein the outcome generator automatically determines whether or not to make a substitution with the stored at least one selected subsets of symbols. ### Claim 5 (depends on 1) A gaming system in accordance with claim 1, and wherein the outcome generator determines whether or not to make a substitution with the stored at least one selected subsets of symbols based on an input from a player. ### Claim 6 A method of gaming for use with a gaming machine playing a first game and a second game, and having a controller, the method comprising selecting, via a controller, a first plurality of subsets of symbols from a plurality of corresponding sets of symbols for the first game; determining, via said controller, an outcome of the first game based on the selected subsets of symbols; selecting, via said controller, without input from a player, at least one of said selected subsets of symbols to be stored; storing, via said controller, said at least one selected subsets of symbols in response to said first game outcome comprising at least one predefined symbol; selecting, via said controller, a second plurality of subsets of symbols from said corresponding sets of symbols for the second game; and substituting, via said controller, said at least one selected subsets of symbols stored in the symbol store for at least one of said second subsets of symbols in response to said at least one selected subsets of symbols resulting in a more favourable win than said second subsets of symbols. ### Claim 7 (depends on 6) A method in accordance with claim 6, further comprising displaying the plurality of sets of symbols in a reel format and wherein storing said at least one selected subsets of symbols comprises storing said at least one selected subsets of symbols in a reel format. ### Claim 8 (depends on 7) A method in accordance with claim 7, and wherein determining whether to substitute, said at least one selected subsets of symbols further comprises determining if the substitution improves the second game outcome. ### Claim 9 (depends on 8) A method in accordance with claim 8, and wherein determining whether to substitute, said at least one selected subsets of symbols comprises receiving a player input.