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1.发明申请公开(公告)号：US20180225915A1
公开(公告)日：2018-08-09
申请号：US15428857
申请日：2017-02-09
Applicant: IGT
Inventor： William Hughes , Christian Gerchak
CPC classification number: G07F17/3213 , G07F17/3225 , G07F17/3244 , G07F17/34
Abstract: Various embodiments of the present disclosure provide a gaming system and method providing a reel-based wagering game having a reel-upgrade feature.
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