Granted Patent
Utility
US 6,558,253 · App. 09/040,478
Slot machine with award multiplier display
Inventors:
Frank C. DeSimone, Robert J. Piechowiak, Charles Miller, Sr., Henry C. Nicholson
Patented Case
View Patent ↗
Granted: May 6, 2003
Filed: Mar 17, 1998
Inventors
Frank C. DeSimone
Robert J. Piechowiak
Charles Miller, Sr.
Henry C. Nicholson
Assignee (at issue)
Sigma Game, Inc.
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.