06971954 is referenced by 100 patents and cites 23 patents.

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 value for each modifier. When certain symbols or combinations of symbols appear on the reels of the gaming device, the present invention modifies either the player's base game wager or a base game payout by the designated value of one of the modifiers. When certain other symbols or combinations of symbols appear on the reels of the gaming device, the present invention increases the designated value position for one or more of the modifiers.

Title
Gaming device having multiple award enhancing levels
Application Number
9/967016
Publication Number
6971954 (B2)
Application Date
September 28, 2001
Publication Date
December 6, 2005
Inventor
Peter Gerrard
Prestwich
GB
Dov L Randall
Whitefield
GB
Agent
Bell Boyd & Lloyd
Assignee
IGT
NV, US
IPC
A63F 013/00
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