Gaming machine with secondary game including a special symbol
US6634941B2 · kind B2 · utility
53Cited by
7References
13Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 16, 2001 |
| Grant date | Oct 21, 2003 |
| Priority date | — |
| Expiry date | Mar 16, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG07F17/3244
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A gaming machine has a display and a game controller arranged to control images displayed on the display. The game controller is arranged to play a game wherein a random event is caused to be displayed on the display. If a predefined winning event results, the machine awards a prize. When a secondary game, following a base game, is completed, a special symbol appears at at least one symbol position of the secondary game. The special symbol replaces, at least temporarily, an underlying symbol at the symbol position to contribute, if applicable, to a prize winning event.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.